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Controllable Intramolecular Motions That Generate Fluorescent Signals for a Metal Scorpionate Complex
Author(s) -
Fabbrizzi Luigi,
Licchelli Maurizio,
Pallavicini Piersandro,
Parodi Luisa
Publication year - 1998
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19980403)37:6<800::aid-anie800>3.0.co;2-u
Subject(s) - deprotonation , fluorescence , intramolecular force , metal , nitrogen atom , molecule , chemistry , atom (system on chip) , photochemistry , side chain , chain (unit) , stereochemistry , ion , physics , polymer , optics , organic chemistry , computer science , group (periodic table) , embedded system , astronomy
Simply by changing the pH value, the side chain of complex 1 can be reversibly moved between two positions. Coordination to the metal center through the nitrogen atom of the side chain at moderate pH values is accompanied by a decrease in fluorescence intensity (from I F =100% to I F =60%). A further decrease is observed upon deprotonation of the bound water molecule at higher pH ( I F ≤2%). Therefore, 1 can be seen as a molecular three‐position switch.