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Changing π-Interactions and Conformational Adjustments of N-(Isonicotinylhydrazide)-1,8-naphthalimide by Hydration and Complexation Affect Photophysical Properties
Crystal Growth & Design ( IF 3.8 ) Pub Date : 2017-12-20 00:00:00 , DOI: 10.1021/acs.cgd.7b01444
Arup Tarai 1 , Jubaraj B. Baruah 1
Affiliation  

Noncovalent self-assemblies of different forms of a 1,8-naphthalimide derivative N-(isonicotinylhydrazide)-1,8-naphthalimide adopt different conformational adjustments due to the interplay of weak interactions. In such assemblies stacking interactions significantly contribute to direct the orientations of tether, which also influenced packing patterns. Effects of weak noncovalent interactions are reflected in the physicochemical properties of solvate and metal complexes of this naphthalimide derivative. Dual fluorescence emissions were observed from hydrate and silver complex of N-(isonicotinylhydrazide)-1,8-naphthalimide, which was not observed in anhydrous form of the compound. These results are compared with fluorescence emission study performed with solution of N-(isonicotinylhydrazide)-1,8-naphthalimide. Aggregation induced fluorescence emission of a solution in DMSO was caused by adding water. This emission in solution occurred at a much different emission wavelength than the emission observed from the hydrated sample in the solid state. It is also established that the aggregation induced fluorescence of N-(isonicotinylhydrazide)-1,8-naphthalimide caused by adding water to a solution of the compound in dimethyl sulfoxide can be quenched by different nitro-phenols.

中文翻译:

水合和络合作用改变N-(异烟酰胺基)-1,8-萘二甲酰亚胺的π-相互作用和构象性调节影响光物理性质

由于弱相互作用的相互作用,不同形式的1,8-萘二甲酰亚胺衍生物N-(异烟酰胺基酰肼)-1,8-萘二甲酰胺的非共价自组装体采用不同的构象调整。在这样的组件中,堆叠相互作用显着地有助于系绳的定向,这也影响了包装方式。非共价弱相互作用的影响反映在这种萘二甲酰亚胺衍生物的溶剂化物和金属配合物的物理化学性质上。从N-(异烟酰胺基酰肼)-1,8-萘二甲酰亚胺的水合物和银络合物观察到双重荧光发射,这在化合物的无水形式中未观察到。将这些结果与使用N溶液进行的荧光发射研究进行比较-(异烟酰胺酰肼)-1,8-萘二甲酰亚胺。加入水引起DMSO溶液中聚集诱导的荧光发射。溶液中的这种发射发生的发射波长与从固态水合样品观察到的发射波长有很大不同。还确定了通过向化合物的二甲基亚砜溶液中加水而引起的N-(异烟酰胺基酰肼)-1,8-萘二甲酰亚胺的聚集诱导的荧光可以被不同的硝基酚猝灭。
更新日期:2017-12-20
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