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Polymers 2018, 10(2), 165;

Anion-Controlled Architecture and Photochromism of Naphthalene Diimide-Based Coordination Polymers

Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing 655011, China
Author to whom correspondence should be addressed.
Received: 1 January 2018 / Revised: 6 February 2018 / Accepted: 7 February 2018 / Published: 8 February 2018
(This article belongs to the Special Issue Coordination Polymer)
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Three new cadmium coordination polymers, namely [Cd(NO3)2(DPNDI)(CH3OH)]·CH3OH (1), [Cd(SCN)2(DPNDI)] (2), and [Cd(DPNDI)2(DMF)2]·2ClO4 (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(NO3)2, Cd(SCN)2, and Cd(ClO4)2, respectively. Compound 1 is a one-dimensional coordination polymer with strong lone pair-π interactions between the coordinated NO3 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. View Full-Text
Keywords: coordination polymer; anion; naphthalene diimide; photochromism; electron transfer coordination polymer; anion; naphthalene diimide; photochromism; electron transfer

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Liu, J.-J.; Xia, S.-B.; Duan, Y.-L.; Liu, T.; Cheng, F.-X.; Sun, C.-K. Anion-Controlled Architecture and Photochromism of Naphthalene Diimide-Based Coordination Polymers. Polymers 2018, 10, 165.

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