A Dynamic Covalent, Luminescent Metallopolymer that Undergoes Sol-to-Gel Transition on Temperature Rise

Autor:	Gabriel Christmann, Xavier de Hatten, Nataliya A. Yufa, Jonathan R. Nitschke, Nicholas A. W. Bell
Rok vydání:	2011
Předmět:	chemistry.chemical_classification Thermochromism Photoluminescence Trioctylphosphine General Chemistry Polymer Photochemistry Biochemistry Catalysis chemistry.chemical_compound Colloid and Surface Chemistry chemistry Covalent bond Diamine Organic chemistry Absorption (chemistry) Luminescence
Zdroj:	Journal of the American Chemical Society. 133:3158-3164
ISSN:	1520-5126 0002-7863
DOI:	10.1021/ja110575s
Popis:	The condensation of linear diamine and dialdehyde subcomponents around copper(I) templates in the presence of bulky trioctylphosphine ancillary ligands gave a linear, conjugated polymeric material in DMSO solution. This polymer solution was observed to undergo sol-to-gel transition as the temperature was raised to 140 °C, in contrast with the behavior of most gel-forming polymers, which do so upon cooling. We attribute the sol-to-gel transition to the formation of Cu(I)N(4) cross-links as the equilibria 2[Cu(I)N(2)P(2)] ⇄ [Cu(I)N(4)] + [CuP(n)](+) + (4 - n)P favor the right-hand side at higher temperatures. The material was also observed to exhibit thermochromism and photoluminescence, with the color and intensity of both absorption and emission exhibiting temperature dependence. This material thus responds predictably to combinations of stimuli (heat, light, mechanical shear) in an interconnected way, as is required to generate complex function.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c970041c754011511ec255fda07c1cf https://doi.org/10.1021/ja110575s Zobrazit plný text záznamu