Category: 950846-89-6

Roy, Saswati Ghosh; Mondal, Subhendu; Ghosh, Kumaresh published the artcile< Copillar[5]arene-rhodamine conjugate as a selective sensor for Hg2+ ions>, Formula: C30H36N4O2, the main research area is copillararene rhodamine conjugate selective sensor mercury.

A new copillar[5]arene coupled rhodamine probe 1 has been designed and synthesized. The mol. probe shows selective sensing of Hg2+ ions over a series of metal ions in CH3CN by exhibiting a color change of the solution as well as ‘turn-on’ fluorescence. Compound 1 also shows interaction with Cu2+ by exhibiting a different color and spectral changes. Furthermore, Hg2+ has been differentiated from Cu2+ by using tetrabutylammonium iodide (TBAI). While in the presence of TBAI, the reddish violet color of the 1-Cu2+ complex becomes colorless with the regeneration of the original electronic spectrum of 1; under identical conditions, the pink color of the 1-Hg2+ complex is not changed in the presence of TBAI. Model compound 2 with no pillar[5]arene moiety has been synthesized to validate the role of pillararene in the selectivity of metal ion sensing. Importantly, compound 2 does not show any selectivity in sensing under identical conditions. Complexation studies are performed by using UV-vis, fluorescence, FTIR and NMR spectroscopic methods.

New Journal of Chemistry published new progress about Colorimetric sensors. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Formula: C30H36N4O2.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Tian, Xing-Ling; Feng, Chao; Zhao, Xu-Hui published the artcile< Corrosion Monitoring Effect of Rhodamine-Ethylenediamine on Copper Relics under a Protective Coating>, Application of C30H36N4O2, the main research area is rhodamine ethylenediamine copper relics protective coating corrosion.

Fluorescence spectroscopy is a common technique used to monitor early metallic corrosion. The fluorescence response characteristics of rhodamine-ethylenediamine toward Cu2+ have been studied using fluorescence and IR spectroscopy. Fluorescence microscopy and electrochem. impedance spectroscopy were used to study the monitoring effect of rhodamine-ethylenediamine on the corrosion of copper relics protected by an epoxy coating. The results showed a strong fluorescent response and selectivity toward Cu2+ that existed using rhodamine-ethylenediamine. Early metallic corrosion of copper relics can be effectively monitored upon adding 0.8 wt% rhodamine-ethylenediamine to an epoxy coating. When the soaking time was increased, the fluorescence intensity of the fluorescent area on the coating became stronger. In addition, the area of the luminous coating reached ∼0.06 mm2 and the area of corrosion under the protective coating was ∼0.008 mm2, which was about 1/10 of the fluorescence area observed on the coating.

ACS Omega published new progress about Coating process. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Application of C30H36N4O2.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Ji, Xiaoqian; Zhang, Wan; Ge, Fangqing; Wang, Chaoxia; Yin, Yunjie; Chen, Kunlin published the artcile< Thermochromic behavior analysis of terminated polyurethane functionalized with rhodamine B derivative>, Electric Literature of 950846-89-6, the main research area is rhodamine B derivative terminated polyurethane print thermochromic cotton fabric; thermochromic property.

A novel “”off-on”” terminated polyurethane based on the rhodamine B modified dye RhEA was constructed with the polyethylene glycol (PEG) and 1,4-butanediol (BDO) as soft segment, isophorone diisocyanate (IPDI) as hard segment. The RhEA terminated polyurethane turned to red from colorless after 254 nm UV induction accompanying transformation of RhEA from a twisted spirolactam to a planarized ring-opened amide. The intensity of absorbance enhanced as UV induction time increased. And the color of the RhEA terminated polyurethane changed from red turned to light red (45 °C) and colorless (65 °C), reversibly. The RhEA terminated polyurethane showed good thermal stability. The thermochromic cotton fabric was obtained with RhEA terminated polyurethane via flat screen printing and it turned to red from white after 254 nm UV induction. The K/S values decreased nearly 65.8% at 45 °C compared to 40 °C suggesting the thermochromic cotton became light red and it turned to white completely at 65 °C. The lactam ring was still retained during the printing process and the thermochromic cotton fabric possessed thermochromic behavior after UV induction. They can be a promising candidate for developing a flexible sensor to monitor environmental changes.

Progress in Organic Coatings published new progress about Color. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Electric Literature of 950846-89-6.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Wang, Xiaochun; Li, Tiechun published the artcile< A novel ""off-on"" rhodamine-based colorimetric and fluorescent chemosensor based on hydrolysis driven by aqueous medium for the detection of Fe3+>, Related Products of 950846-89-6, the main research area is rhodamine colorimetric fluorescent chemosensor hydrolysis iron; Chemosensor; Fe(3+); Fluorescence enhancement; Living cell imaging; Rhodamine B.

A novel “”off-on”” colorimetric and fluorescent chemosensor N2,N6-bis(2-(rhodamine B amido)ethyl)pyridine-2,6-dicarboxamide (RhBEP) (I) has been designed and synthesized, which can selectively detect the presence of Fe3+ with about 75-fold enhancement in fluorescence emission intensity at 585 nm over various environmentally relevant metal cations such as Hg2+, Cu2+, Cr3+, Li+, Na+, K+, Ag+, Zn2+, Mg2+, Ca2+, Ba2+, Fe2+, Cd2+, Ni2+, Mn2+, Al3+, Bi3+ and Au3+ in PBS reaction media. The remarkable color change from UV-Vis titration experiments indicates that RhBEP can be used as a colorimetric chemosensor for Fe3+. The ultrasensitive detection limit for Fe3+ in the fluorescence measurement is down to 2.0 × 10-8 mol·L-1. The recognition mechanism of RhBEP to Fe3+ was analyzed by Job’s plot and mass spectrometry anal. In addition, the data from fluorescent cell imaging experiments confirmed that the chemosensor RhBEP has a promising application for the detection of Fe3+ in biol. systems.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about Biological imaging. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Related Products of 950846-89-6.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Kredel, Julia; Gallei, Markus published the artcile< Ozone-Degradable Fluoropolymers on Textile Surfaces for Water and Oil Repellency>, Formula: C30H36N4O2, the main research area is ozone degradable fluoropolymer textile surfaces water oil repellency.

Resistant and functional coatings on surfaces have been of growing interest recently. Functional textiles featuring water- and oil-repellent properties can be achieved by convenient coating of textiles with highly fluorinated polymers. Recently, concerns about (per)fluorinated mols. have been reported due to the high persistence and accumulation capabilities in nature, driving the textile market to develop alternatives and novel strategies. Within this study an ozone-degradable fluorinated polymer for water and oil repellency on various textiles is reported. The monomer 2-((1,1,2-trifluoro-2-(perfluoropropoxy)ethyl)thio)ethyl acrylate is capable of side-chain degradation upon ozone treatment due to the presence of chem. cleavable moieties. The degradable fluorine-containing polymer is accessible via radical polymerization in emulsion polymerization and can be directly applied onto various textiles, e.g., polyamide, polyester, Nomex, or cotton, by using a foulard. To investigate the homogeneous coating performance on the resp. textiles, a model polymer featuring a fluorescent monomer as part of the polymer chain is prepared, enabling the investigation of the polymer distribution via confocal microscopy. Finally, the effect of the fluorine moieties and the molar mass of the polymers is investigated, and the ozone-induced degradation is elucidated. The herein-described fluorinated polymers are envisaged to be a promising and nonpersistent platform for the preparation of omniphobic textile coating.

ACS Applied Polymer Materials published new progress about Cellulose pulp. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Formula: C30H36N4O2.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Wang, Lei; Zhou, Ying; Zhang, Yan; Zhang, Guomei; Zhang, Caihong; He, Yujian; Dong, Chuan; Shuang, Shaomin published the artcile< A novel cell-penetrating Janus nanoprobe for ratiometric fluorescence detection of pH in living cells>, SDS of cas: 950846-89-6, the main research area is cell penetrating Janus nanoprobe ratiometry fluorescence pH cell imaging; Intracelluar pH; Janus nanoprobe; Ratiometric detection.

pH regulates the function of many organelles and plays a pivotal role in requiring multitud cellular behaviors. Compared with single fluorescent probes, ratio fluorescent probes have higher sensitivity and immunity to interference. Herein, a novel Janus ratio nanoprobe was developed for intracellular pH detection. Modified rhodamine B probe and fluorescein isothiocyanate (FITC) were individually encapsulated in the independent hemispheres of Janus microparticles fabricated via Pickering emulsion. Moreover, it exhibits a satasified ratiometric detection of pH compared to the previous core-shell structure and organic small mol. probe. Accordingly, the Janus nanoprobe possesses many important features as an attractive sensor, including high anti-jamming capability, excellent stability, good reversibility and low cytotoxicity. Variations of the two fluorescence intensities (Fgreen/Fred) resulted in a ratiometric pH fluorescent sensor, which can respond to wide range of pH values from 3 to 8. To be more specific, with a single excitation wavelength of 488 nm, there are dual emission bands centered at 538 nm and 590 nm. Also the Janus nanoprobe displays a excellent linear relation in the physiol. relevant pH range of 4.0-6.0. Consequently, detecting of pH and imaging was successfully achieved in living cells, which provides a simple and reliable method for detecting intracelluar pH and other similar substances.

Talanta published new progress about Acid-base indicators. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, SDS of cas: 950846-89-6.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Banerjee, Sovan Lal; Saha, Pabitra; Ganguly, Ritabrata; Bhattacharya, Koushik; Kalita, Uddhab; Pich, Andrij; Singha, Nikhil K. published the artcile< A dual thermoresponsive and antifouling zwitterionic microgel with pH triggered fluorescent ""on-off"" core>, Application In Synthesis of 950846-89-6, the main research area is thermoresponsive antifouling zwitterionic microgel fluorescence; Antifouling; Dual thermoresponsiveness; Fluorescence; LSCT; Microgel; UCST; Zwitterion.

A unique, tailor-made, zwitterionic, dual thermoresponsive and fluorescent microgel probe was synthesized via Reversible Addition Fragmentation chain-Transfer (RAFT) polymerization Microgels were prepared via oil in water (o/w) emulsion polymerization where poly(carboxybetaine) (PCB) acted as a macro-RAFT reagent as well as an emulsifier. The presence of poly(N-vinylcaprolactam) (PNVCL) in the microgel system imparts the thermoresponsiveness to the system and the presence of a rhodamine derivative as fluorophore makes it responsive to pH change of the system by showing a fluorescence emission at 580 nm (reddish orange color). The dual thermoresponsiveness [i.e. the presence of upper critical solution temperature (UCST @ 12°C) as well as lower critical solution temperature (LCST @ 33°C)] of the microgels was studied via UV-visible spectroscopy (UV-vis) and temperature responsive dynamic light scattering (DLS) analyses. Presence of the PCB in the corona-crosslinked microgel, played a vital role in the formation of self-assembled structure as well as in protein immobilization (antifouling activity). Antifouling property was studied using UV-vis spectroscopy where bovine serum albumin (BSA) was taken as a model protein. The presence of the pH-responsive fluorescence, thermoresponsiveness as well as antifouling properties makes this zwitterionic microgel system a potential a potential candidate for medical diagnostics and for drug delivery vehicles.

Journal of Colloid and Interface Science published new progress about Antifouling agents. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Application In Synthesis of 950846-89-6.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Liu, Yuanyuan; Li, Yi; Zong, Linghui; Zhang, Jingyi published the artcile< Comparison of Two Rhodamine-polyamine Polystyrene Solid-phase Fluorescence Sensors for Hg(II) Detection Based on Theoretical Calculation>, COA of Formula: C30H36N4O2, the main research area is rhodamine polyamine polystyrene fluorescence sensor mercury detection.

Two novel rhodamine-based polystyrene solid-phase fluorescence sensors PS-PA-I and PS-PA-II with different lengths of polyamines were synthesized for Hg(II) determination The detection mechanism involving the Hg(II) chelation-induced spirocycle open of rhodamine was proposed with the aid of theor. calculation The stronger N-Hg bond and the longer polyamine chain in PS-PA-II led to a better selectivity, much higher and more quickly fluorescence response to Hg(II).

Chemical Research in Chinese Universities published new progress about Fluorescence. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, COA of Formula: C30H36N4O2.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Cengiz, Nergiz published the artcile< Fabrication of Multifunctional Stimuli-Responsive Hydrogels Susceptible to both pH and Metal Cation for Visual Detections>, Safety of 2-(2-Aminoethyl)-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one, the main research area is multifunctional stimuli responsive hydrogel pH metal cation colorimetric sensor.

Advances in several areas of contemporary biomaterial science are closely related to the design of stimuli-responsive smart materials. An important aspect that governs widespread adaptation of a synthetic biomaterial depends on its ease of synthesis, as well as facile functionalization. Readily available homo-bifunctional PEG-based diamines are mixed with a tetra-arm epoxide based cross-linker to yield hydrogels through the epoxy-amine addition reaction. Hydrogels obtained with varying chain lengths of PEG polymer were characterized for their morphol., swelling, and rheol. properties. The residual epoxide groups within the hydrogel were used for post-gelation functionalization to obtain a functional material. In particular, functionalization with an amine-containing rhodamine derivative yields a hydrogel that serves as a colorimetric sensor for acidic pH environment, and indicates Fe3+ cation with high specificity.

Macromolecular Chemistry and Physics published new progress about Cations. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Safety of 2-(2-Aminoethyl)-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Wang, Lei; Zhou, Ying; Zhang, Yan; Zhang, Guomei; Zhang, Caihong; He, Yujian; Dong, Chuan; Shuang, Shaomin published the artcile< A novel cell-penetrating Janus nanoprobe for ratiometric fluorescence detection of pH in living cells>, Safety of 2-(2-Aminoethyl)-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one, the main research area is cell penetrating Janus nanoprobe ratiometry fluorescence pH cell imaging; Intracelluar pH; Janus nanoprobe; Ratiometric detection.

pH regulates the function of many organelles and plays a pivotal role in requiring multitud cellular behaviors. Compared with single fluorescent probes, ratio fluorescent probes have higher sensitivity and immunity to interference. Herein, a novel Janus ratio nanoprobe was developed for intracellular pH detection. Modified rhodamine B probe and fluorescein isothiocyanate (FITC) were individually encapsulated in the independent hemispheres of Janus microparticles fabricated via Pickering emulsion. Moreover, it exhibits a satasified ratiometric detection of pH compared to the previous core-shell structure and organic small mol. probe. Accordingly, the Janus nanoprobe possesses many important features as an attractive sensor, including high anti-jamming capability, excellent stability, good reversibility and low cytotoxicity. Variations of the two fluorescence intensities (Fgreen/Fred) resulted in a ratiometric pH fluorescent sensor, which can respond to wide range of pH values from 3 to 8. To be more specific, with a single excitation wavelength of 488 nm, there are dual emission bands centered at 538 nm and 590 nm. Also the Janus nanoprobe displays a excellent linear relation in the physiol. relevant pH range of 4.0-6.0. Consequently, detecting of pH and imaging was successfully achieved in living cells, which provides a simple and reliable method for detecting intracelluar pH and other similar substances.

Talanta published new progress about Acid-base indicators. 950846-89-6 belongs to class indole-building-block, and the molecular formula is C30H36N4O2, Safety of 2-(2-Aminoethyl)-3′,6′-bis(diethylamino)spiro[isoindoline-1,9′-xanthen]-3-one.

Referemce:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles