Design and Synthesis of Metal Ion-Recognition-Induced Conjugated Polymers: An Approach to Metal Ion Sensory Materials
摘要:
The synthesis and metal ion responsive properties of two 2,2'-bipyridyl-phenylene-vinylene-based polymers is reported. These polymers are designed to be partially conjugated in their metal-free state and fully conjugated when exposed to metal ions so that the ion-induced conjugation enhancement can be transduced into a measurable signal. It is found that these polymers exhibit highly ionochromic effects with a wide variety of transition and main group metal ions excluding metal ions of the alkali and alkaline earth groups. For instance, both absorption and fluorescence emission bands of the polymers upon exposure to metal ions can be red-shifted up to 120 nm, depending on the metal ions present and the polymers used.
Efficient Synthesis of Novel Porphyrin Dimers with Versatile Linkers via Bis(dipyrromethanes) in an Excellent Mixed-Solvent
作者:Hongbin Zhao、Junxu Liao、Deliang Yang、Yujia Xie、Yongjun Xu、Hongke Wang、Bangying Wang
DOI:10.1071/ch12521
日期:——
A general and efficient protocol has been developed to synthesise a series of novel porphyrin dimers with versatile aryl linkers via a simultaneous condensation-cyclisation-oxidation reaction of diverse bis(dipyrromethanes) with dipyrromethane-dicarbinol catalysed by indium(iii) chloride at room temperature in an efficient CH2Cl2 and CH3CN mixed-solvent. The reaction yields increased to 21–26 % based
applied GV1–6 as non‐viral genevectors for tracking DNA delivery in living cells by one‐ and two‐photon fluorescence microscopies. In two‐photon microscopy, a high signal‐to‐noise contrast was achieved by irradiation with an 830 nm laser. This is the first example of the use of transition‐metal complexes for two‐photon luminescenttracking of the cellular pathways of gene delivery and as DNA carriers
Abstract A convenient method for synthesizing 2,5‐dialkoxyterephthalaldehyde by oxidation of 1,4‐dialkoxy‐2,5‐bis(halogenomethyl)benzene with dimethyl sulfoxide in one step is described.
Efficient Synthesis of Novel Bis(dipyrromethanes) with Versatile Linkers via Indium(III) Chloride-Catalyzed Condensation of Pyrrole and Dialdehydes
作者:Hongbin Zhao、Junxu Liao、Jingheng Ning、Yujia Xie、Yingjie Cao、Liang Chen、Deliang Yang、Bangying Wang
DOI:10.1002/adsc.201000336
日期:2010.11.22
series of novel bis(dipyrromethanes) with versatile arylene linkers through an indi- um(III) chloride-catalyzed condensation reaction between various dialdehydes and pyrrole has been developed. This protocol is applicable to constructing a variety of bis(dipyrromethanes) with diverse functional linkers, which provides a powerful route to construct libraries of functionalized porphyrin dimers and even
Design and Synthesis of Metal Ion-Recognition-Induced Conjugated Polymers: An Approach to Metal Ion Sensory Materials
作者:Bing Wang、Michael R. Wasielewski
DOI:10.1021/ja962229d
日期:1997.1.1
The synthesis and metal ion responsive properties of two 2,2'-bipyridyl-phenylene-vinylene-based polymers is reported. These polymers are designed to be partially conjugated in their metal-free state and fully conjugated when exposed to metal ions so that the ion-induced conjugation enhancement can be transduced into a measurable signal. It is found that these polymers exhibit highly ionochromic effects with a wide variety of transition and main group metal ions excluding metal ions of the alkali and alkaline earth groups. For instance, both absorption and fluorescence emission bands of the polymers upon exposure to metal ions can be red-shifted up to 120 nm, depending on the metal ions present and the polymers used.