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Multi-modulated photochromic behavior of a D-A type dithienylethene
摘要： The development of multiresponsive photochromic materials is of increasing interest for their potential application in the complicated chemical and biological environment. Here, a novel D-A type dithienylethene derivative NDM, in which dimethylamino group acted as both electron donor (D) and recognition moiety for H+, and the dicyanovinyl group functioned as electron acceptor (A) and responsed to cyanide anion, has been designed and synthesized. And its structure was confirmed by 1H NMR, 13C NMR and HRMS (ESI). As expected, dithienylethene NDM exhibited distinctive multi-modulated photochromic properties by solvent, acid and cyanide anion stimulation. Moreover, NDM can be acted as a potential fluorescent turn-on pH-sensor and colorimetric sensor for CN- in biological field.
关键词： solvent,multi-modulated,dithienylethene,acid,photochromism,cyanide anion
更新于2025-09-23 15:21:01
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Conjugated Polymers Containing BODIPY and Fluorene Units for Sensitive Detection of CN? Ions: Site-Selective Synthesis, Photo-Physical and Electrochemical Properties
摘要： Conjugated polymers containing distinct molecular units are expected to be very interesting because of their unique properties endowed by these units and the formed conjugated polymers. Herein, four new conjugated copolymers based on fluorene and 4,4’-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) have been designed and synthesized via Sonogashira polymerization. The fluorene unit was attached to the 3,5- or 2,6-positions of BODIPY by ethynylenes or p-diacetylenebenzene. The obtained polymers show good thermal stability and broad absorption in the wavelength range from 300 to 750 nm. The effects of site-selective copolymerization and conjugation length along the polymer backbone on the optoelectronic and electrochemical properties of these copolymers were systematically studied by UV-Vis spectroscopy, photoluminescence (PL) and cyclic voltammetry. Besides, it is found that the BODIPY-based copolymers exhibit selectively sensitive responses to cyanide anions, resulting in obvious change of UV-Vis absorption spectra and significant fluorescence quenching of the polymers among various common anions.
关键词： conjugated copolymers,site-selective,cyanide anion,BODIPY
更新于2025-09-23 15:21:01