A Multi-Responsive Cd-Viologen Complex: Photochromism, Photomodulated Fluorescence, and Luminescent Sensing

摘要

By incorporating a viologen moiety into a framework, a multiresponsive 2D bilayered luminescent Cd-viologen complex {[Cd_(1.5)(Cebpy)(Hbtc)CI]·H2O}n, (1, Cebpy= 1-carboxyethyl-4, 4'-bipyridine, H3Hbtc=1, 3, 5-benzenetricarboxylic acid) has been synthesized. The reversible photochromism from light brown to dark bluish-grey is implemented due to the favourable spatial stack of the electron donor and acceptor. The photochromic component of the organic linkers can modulate the luminescence of compound 1 under irradiation by using a Xenon lamp. At the same time, compound 1 shows a good potential in luminescent sensing for colored transition metal cations. Thus, multiphotofunctionality, viz. photolumines-cence, photochromism as well as the derivate fluorescent responses to irradiation and colored transition metal cations have been combined in the Cd-viologen complex 1, which is the first example in the Cd-viologen-based photochromic hybrid materials.