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Anion-Controlled Architecture and Photochromism of Naphthalene Diimide-Based Coordination Polymers
Three new cadmium coordination polymers, namely [Cd(NO(3))(2)(DPNDI)(CH(3)OH)]·CH(3)OH (1), [Cd(SCN)(2)(DPNDI)] (2), and [Cd(DPNDI)(2)(DMF)(2)]·2ClO(4) (3) (DPNDI = N,N-di(4-pyridyl)-1,4,5,8-naphthalene diimide, DMF = N,N-dimethylformamide) have been synthesized by reactions of DPNDI with Cd(NO(3))(...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415121/ https://www.ncbi.nlm.nih.gov/pubmed/30966201 http://dx.doi.org/10.3390/polym10020165 |
Sumario: | Three new cadmium coordination polymers, namely [Cd(NO(3))(2)(DPNDI)(CH(3)OH)]·CH(3)OH (1), [Cd(SCN)(2)(DPNDI)] (2), and [Cd(DPNDI)(2)(DMF)(2)]·2ClO(4) (3) (DPNDI = N,N-di(4-pyridyl)-1,4,5,8-naphthalene diimide, DMF = N,N-dimethylformamide) have been synthesized by reactions of DPNDI with Cd(NO(3))(2), Cd(SCN)(2), and Cd(ClO(4))(2), respectively. Compound 1 is a one-dimensional coordination polymer with strong lone pair-π interactions between the coordinated NO(3)(−) anions and the imide ring of DPNDI; while 2 is a two-dimensional network with a (4, 4) net topology. In the case of 3, due to the presence of uncoordinated perchlorate counter ions, it exhibits a non-interpenetrated square-grid coordination polymer containing one-dimensional rhomboid channels. The structural diversity in these compounds is attributed to different coordination abilities and geometries of counter anions. Due to the presence of electron-deficient NDI moiety, the photochromic behavior of these compounds was studied. Interestingly, only compounds 1 and 3 exhibit color changes under light irradiation. The influence of the anions on the photochromism process of the NDI-based materials has been discussed. |
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