Photoreversible Zn 2+ Ion Transportation Across an Interface Using Ion‐Chelating Substituted Photochromic 3,3′‐Indolospirobenzopyrans: Steric and Electronic Controlling Effects

Autor:	Peter G. Sammes, Ayse Abdullah, Craig J. Roxburgh
Rok vydání:	2008
Předmět:	Inorganic Chemistry Spiropyran Steric effects chemistry.chemical_compound Photochromism chemistry Proton NMR Biasing Chelation Photochemistry Spectroscopy Ion
Zdroj:	European Journal of Inorganic Chemistry. 2008:4951-4960
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.200800614
Popis:	The photoreversible transportation of Zn 2+ ions across an interface using photochromic substituted-spirobenzopyrans has been demonstrated. The inclusion of strategically placed sterically influencing 3'-methyl-3b and 3-spirocyclohexyl-3c groupings is investigated and compared to the unsubstituted analogue 3a. Significant control over the spiropyran ring-opening↔closing reaction, and hence Zn 2+ ion transportation has been realised. Additionally, the spiropyran ring-opening↔closing reactions of two skeletally identical spirobenzopyrans 4 and 5, but possessing "electronically-modifying" 5-trifluoromethyl-substitutents have been studied by 1 H NMR spectroscopy: this has enabled us to realise the additional biasing, on the ring-opening↔closing process, excerpted on these systems through both selectively placed, inductively controlling functional-group substitution and/or, simultaneously, sterically influencing group substitution.
Databáze:	OpenAIRE
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