Variations in the emission of polymethylene-vaulted trans-bis(salicylaldiminato)platinum(II) complexes incorporating methoxy functionalities with linkage length and substitution position

Polymethylene-vaulted trans-bis(salicylaldiminato)platinum(II) complexes bearing methoxy functionalities exhibit highly regular variations in emission wavelengths with changes in both the substituent position and the linkage length in the glassy state in 2-MeTHF. [Display omitted] A series of methox...

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Bibliographic Details
Published in:Polyhedron 2015-09, Vol.98, p.75-83
Main Authors: Komiya, Naruyoshi, Okada, Minoru, Inoue, Ryo, Kawamorita, Soichiro, Naota, Takeshi
Format: Article
Language:English
Subjects:
Chromogenic control
Phosphorescence
Platinum(II)
Schiff base
Vaulted structure
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Summary:Polymethylene-vaulted trans-bis(salicylaldiminato)platinum(II) complexes bearing methoxy functionalities exhibit highly regular variations in emission wavelengths with changes in both the substituent position and the linkage length in the glassy state in 2-MeTHF. [Display omitted] A series of methoxy-substituted trans-bis(salicylaldiminato)platinum(II) complexes (1b, 2b, 3b, 4a–d, 5a–d and 6a–d) incorporating octa-, nona-, deca-, undeca-, dodeca- and tridecamethylene bridges has been synthesized and their unique structure-dependencies in the solution state emission are described. Methoxy-substitution on the aromatic rings was found to improve the emission quantum efficiency in the glassy state in 2-MeTHF at 77K. Chromogenic control over a range of 70nm was demonstrated, with the 3-, 4-, 5- and 6-methoxy substitutions giving yellow, green, orange and yellow-green emissions, respectively. These complexes exhibited obvious linker-dependent emission chromism under the same conditions, such that a very regular hypsochromic shift from yellow to green was observed upon increasing the linker length.
ISSN:0277-5387
DOI:10.1016/j.poly.2015.05.035