A series of novel multichromophoric, luminescent compounds has been prepared, and their absorption spectra, luminescence properties (both at 77K in rigid matrix and at 298 K in fluid solution), and photoinduced intercomponent energy‐transfer processes have been studied. The series contains two new multichromophoric systems 1 and 2, each one containing two different boron–dipyrromethene (Bodipy) subunits
Design, synthesis and redox properties of a fluorene platform linking two different Bodipy dyes
作者:Thomas Bura、Raymond Ziessel
DOI:10.1016/j.tetlet.2010.03.095
日期:2010.5
Several new fluorophores have been prepared by grafting boradiazaindacene (red absorbing) and/or styrylboradiazaindacene (blue absorbing) units as terminal energy acceptors onto a fluorene-derived platform. In one case, an amino-bis(bipyridine) pocket has been attached to enable strong binding of transition metal ions. The stepwise syntheses were largely based on Pd-catalysed cross-coupling reactions. The electrochemistry of the dyes has been analysed by reference to the properties of the various synthetic intermediates, protonation of the tertiary amine site present in the bis(bipyridine) species enabling processes involving this centre to be distinguished from those associated with the boradiazaindacene (Bodipy) unit. (C) 2010 Elsevier Ltd. All rights reserved.
作者:Christine Tran、Nawel Berqouch、Hamid Dhimane、Guillaume Clermont、Mireille Blanchard-Desce、David Ogden、Peter I. Dalko
DOI:10.1002/chem.201604500
日期:2017.2.3
Quadrupolarprobes derived from 8‐dimethylamino‐quinoline (8‐DMAQ) having a pegylated fluorene core were prepared and studied under “one‐photon” (λ=365 nm) and “two‐photon” (TP) (λ=730 nm) irradiation conditions. Compound 1 a was identified as the most efficient probe by UV activation that showed sequential release of acetic acid as a model. Although the probe showed high two‐photon absorption it stayed