Kinetic Stabilization of Blue‐Emissive Anthracenes: Phenylene Bridging Works Best
作者:Marvin Nathusius、Daniel Sleeman、Junyou Pan、Frank Rominger、Jan Freudenberg、Uwe H. F. Bunz、Klaus Müllen
DOI:10.1002/chem.202103285
日期:2021.12
In attempts at kinetically stabilizing blue-emissive anthracenes a series of 9,10-biarylated derivatives were investigated. Bis-meta-terphenylyl substitution highly increased photochemical and photooxidative stability. Ring closure to [6]cyclo-meta-hexaphenylene bridged anthracene increased protection even further resulting in an additional stabilization.
A Rational Approach to Fluorescence “Turn-On” Sensing of α-Amino-carboxylates
作者:Dowook Ryu、Eunju Park、Dae-Sik Kim、Shihai Yan、Jin Yong Lee、Byoung-Yong Chang、Kyo Han Ahn
DOI:10.1021/ja078308e
日期:2008.2.1
A rational approach to fluorescence turn-on sensing of amino carboxylates is described, which primarily relies on the perturbation of the quenching n-pi* transiton energy level of a carbonyl ionophore relative to the pi-pi* transition energy level of an anthracene in the sensor. The anthracene-based bis (trifluoroacetylcarboxanilide) sensor is structurally simple but selectively senses alpha-amino acids as their carboxylate forms over beta and gamma-homologues, by forming a (1:1)-cyclic adduct with a large fluorescence enhancement factor of 110.