Naphthalene diimides (NDIs), a class of organic dyes with high photochemical activity and high redox activity, have attracted considerable interest attributing to their photoinduced electron transfer to form stable radical anions upon irradiation in the presence of electron donors. In this study, a naphthalenediimide-based ligand and different aromatic carboxylic acids self-assembled in the presence of zinc ions, forming three novel coordination polymers, [Zn₂ (DPMNI) (TPDC)₂] (1), [Zn (DPMNI) (BPC)] (2), Zn (DPMNI) (HBTC) (3) (DPMNI = N,N′-bis(4-pyridylmethyl)-1,4,5,8-naphthalene diimide, H₂TPDC = thiophene-2,5-dicarboxylic acid, H₂BPC = 4,4′-biphenyldicarboxylic acid, H₃BTC = 1,3,5-benzenetricarboxylic acid). These coordination polymers characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, powder X-ray diffraction, and theromgravimetric analysis. Because of the presence of electron-deficient NDI moieties, they exhibit reversible photochromic properties. Furthermore, due to the different π–π interactions between the NDI moieties and aromatic carboxylic acid, compounds 1–3 exhibit different photosensitive properties. Moreover, the solvatochromic behaviour of compound 1 was also investigated.

萘二酰亚胺（NDI）是一类具有高光化学活性和高氧化还原活性的有机染料，由于在给电子体的作用下进行辐照后，它们的光致电子转移形成了稳定的自由基阴离子，因此引起了极大的兴趣。在这项研究中，基于萘二酰亚胺的配体和不同的芳族羧酸在锌离子存在下自组装，形成了三种新型配位聚合物[Zn ₂（DPMNI）（TPDC）₂ ]（1），[Zn（DPMNI） （BPC）]（2），锌（DPMNI）（HBTC）（3）（DPMNI =  N，N'-双（4-吡啶甲基）-1,4,5,8-萘二酰亚胺，H ₂ TPDC =噻吩- 2,5-二羧酸H ₂BPC = 4,4'-联苯二甲酸，H ₃ BTC = 1,3,5-苯三甲酸）。这些配位聚合物的特征在于单晶X射线衍射，元素分析，红外光谱，粉末X射线衍射和热重分析。由于存在电子不足的NDI部分，它们显示出可逆的光致变色特性。此外，由于所述NDI部分和芳香族羧酸之间的不同π-π相互作用，化合物1 - 3显示出不同照相感光性能。此外，还研究了化合物1的溶剂变色行为。