Effect of conformational flexibility on photophysics of bis-coumarins
作者:Łukasz Kielesiński、Daniel T. Gryko、Andrzej L. Sobolewski、Olaf W. Morawski
DOI:10.1039/c8cp01084f
日期:——
the absence of the intramolecular hydrogen bonding interaction. The photophysical effect of this is the appearance of two fluorescence bands, the relative intensity and spectral positions of which are sensitive to the environment. Theoretical explorations of the excited-state potential energy surfaces performed with the aid of the ADC(2) ab initio electronic structure theory method revealed an exceptional
Cumarin-Verbindungen und ihre Verwendung als Aufheller für organische hochmolekulare Materialien
申请人:BAYER AG
公开号:EP0005172A1
公开(公告)日:1979-11-14
Zum Weißtönen von synthetischen Fasermaterialien, nsbesondere Polyestermaterialien, eignen sich vorzüglich Verbindungen der Formel
in der
R, und R2 = Wasserstoff, Alkyl, Aralkyl oder Aryl, (jedoch nicht gleichzeitig Wasserstoff)
X = Cyan- oder Estergruppe ist.
Die erzielten Aufhellungen sind wasch- und lichtecht. Man erhält die Verbindungen I z. B. durch Kondensation entsprechender Triazolylsalicylaldehyde mit Cyanessigestern oder Malonestern.
用于增白合成纤维材料,尤其是聚酯材料,其化合物的化学式为
中的
R,和 R2 = 氢、烷基、芳烷基或芳基(但不能同时为氢)
X = 氰基或酯基。
得到的增白剂具有耐洗和耐光性。化合物 I 可通过相应的三唑水杨醛与氰基乙酸酯或丙二酸酯缩合得到。
Flourescent exomarker probes for hydrogen sulfide detection
申请人:AMRITA VISHWA VIDYAPEETHAM
公开号:US10502742B2
公开(公告)日:2019-12-10
A fluorescence probe with mitochondrial targeting and two-photon property, its preparation method and application in detecting and tracking endogenous H2S in samples or living cells. The fluorescent probe is prepared by a four-step preparation method and demonstrates a UV-vis absorption increment λab=395 nm and ˜43 fold higher fluorescence intensity in the presence of H2S. The probe further demonstrates stability, selectivity for H2S over competing agents and sensitivity as low as 20 nm. A method of detecting endogenous H2S rapidly in the absence of any external stimulators is provided. Samples are contacted with the probe and the changes in fluorescence are monitored to detect H2S levels. The disclosed probe is non-toxic and suitable as a biomarker and therapeutic molecule in cancer and other diseases.