One-pot synthesis of a red-fluorescent chemosensor from an azacrown, phloroglucinol and squaric acid: A simple in-solution construction of a functional molecular device.

Date

1997-06-23

Author

Oguz, U
Akkaya, EU

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

80
views

0
downloads

A long wavelength fluorescent, squaraine-based chemosensor has been synthesized in one step from commercially available precursors. The resulting squaraine derivative absorbs maximally at 635 nm (epsilon = 260,000) and the emission peak is at 665 nm. This azacrown-appended squaraine signals alkaline and earth-alkaline metal ions in millimolar concentrations in acetonitrile. (C) 1997 Elsevier Science Ltd.

Subject Keywords

Pphotophysical properties, Cation binding, Generation, Dyes, Indicators, Electrophotography, Calcium

URI

https://hdl.handle.net/11511/66122

Journal

TETRAHEDRON LETTERS

DOI

https://doi.org/10.1016/s0040-4039(97)00916-7

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

A squaraine-based near IR fluorescent chemosensor for calcium Akkaya, Engin U.; Türkyılmaz, Serhan (1997-06-23) A red to NIR emitting, highly Ca2+-specific fluorescent chemosensor has been synthesized. In pH 7.2 aqueous buffers, the chemosensor signals Ca2+ by a decrease in emission intensity, whereas large excess of Mg2+ ions have no effect on either the absorption or the emission spectrum. The chemosensor is likely to be the prototype of a new generation of laser-diode excitable fluorescent chemosensors for Calcium. (C) 1997 Elsevier Science Ltd.
A theoretical study on the simplest fullerene, C-20 - an AM1 treatment Türker, Burhan Lemi (Elsevier BV, 2003-05-05) Within the constraints of AM1 (UHF) type semiempirical quantum chemical treatment, C-20 and its cationic and anionic forms were considered for their stabilities. The results revealed that C-20 has a greater tendency to act as electron acceptor than a donor. C-20(-) and C-20(-2) were found to be even more stable than C-20.
Preparation of BaxSr1-xTiO3 thin films by chemical solution deposition and their electrical characterization Adem, Umut; Özenbaş, Ahmet Macit; Department of Metallurgical and Materials Engineering (2003) In this study, barium strontium titanate (BST) thin films with different compositions (Ba0.9Sr0.1TiO3, Ba0.8Sr0.2TiO3, Ba0.7Sr0.3TiO3, Ba0.5Sr0.5TiO3) were produced by chemical solution deposition technique. BST solutions were prepared by dissolving barium acetate, strontium acetate and titanium isopropoxide in acetic acid and adding ethylene glycol as a chelating agent and stabilizer to this solution, at molar ratio of acetic acid/ethylene glycol, 3:1. The solution was then coated on Si and Pt//Ti/SiO2/Si ...
A mean-field model for the phase diagram of liquid crystals Tublek, A; Yurtseven, Hasan Hamit; Salihoglu, S (Informa UK Limited, 1998-01-01) In this study we have developed a mean-field model to obtain the phase diagram for a mixture of liquid crystals. Our mean-field model gives the phase diagram of the nematic, smectic A and smectic C phases near the NAC point. We have fitted our model to the experimentally observed data. From this fitting, we conclude that our mean-field model explains correctly the experimentally observed behavior of a mixed liquid crystalline system near the NAC point.
One-step synthesis of N-doped metal/biochar composite using NH3-ambiance pyrolysis for efficient degradation and mineralization of Methylene Blue Mian, Md Manik; Liu, Guijian; Yousaf, Balal; Fu, Biao; Ahmed, Rafay; Abbas, Qumber; Munir, Mehr Ahmed Mujtaba; Liu Ruijia, Liu Ruijia (2019-04-01) A series of new biochar-supported composite based on the combination of biochar and metallic nanoparticles (NPs) were produced through single-step pyrolysis of FeCl3-Ti(OBu)(4) laden agar biomass under NH3 environment. The physiochemical properties of composites were characterized thoroughly. It has found that heating temperature and N-doping through NH3-ambiance pyrolysis significantly influence the visible-light sensitivity and bandgap energy of composites. The catalytic activities of composites were meas...

Citation Formats

U. Oguz and E. Akkaya, “One-pot synthesis of a red-fluorescent chemosensor from an azacrown, phloroglucinol and squaric acid: A simple in-solution construction of a functional molecular device.,” TETRAHEDRON LETTERS, pp. 4509–4512, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66122.