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Trans A2B2 Porphyrins: Synthesis, Crystal Structure Determinations and Hirshfeld Surface Analysis
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-06-29 , DOI: 10.1002/slct.202001052
Padma Dechan 1 , Gauri Devi Bajju 1 , Puneet Sood 2
Affiliation  

Trans‐A2B2 porphyrins containing p‐methoxyphenyl (A)/p‐methylphenyl (B) (P4 ) and p‐chlorophenyl (A)/p‐methylphenyl (B) (P5 ) at the four meso (−CH=) positions of the tetrapyrrolic macrocycles have been synthesized by employing the two steps modified Adler's methodology. Remarkably, the present synthetic scheme afforded us the needle shaped single crystals of (P4 ) and (P5 ) that helped us investigate the three dimensional structural architectures of the prepared Trans‐A2B2 porphyrins. Hirschfeld surface analysis (HSs) was used to visualize the fidelity of the crystal structures of (P4 ) and (P5 ). This method permitted the identification of individual types of intermolecular contacts and their impact on crystal packings. Molecules are linked by a combination of H⋅ ⋅ ⋅H and C⋅ ⋅ ⋅H contacts, which have clear signatures in the corresponding fingerprint plots. The effect of incorporating two different non sterically demanding functionalities at the para positions of meso phenyl rings on the optical and thermal properties of symmetric (A4) porphyrins i. e. Tetra‐para‐methoxy phenyl porphyrin P1 , Tetra‐para‐methyl phenyl porphyrin P2 and Tetra‐para‐chloro phenyl porphyrin P3 , have been investigated and the results have been discussed in detail.

中文翻译:

反式A2B2卟啉:合成,晶体结构测定和Hirshfeld表面分析

反-A 22个含有对甲氧基苯基(A)/对-甲基苯基(B)(卟啉P 4 )和对氯苯基(A)/对-甲基苯基(B)(P 5 在四个内消旋的)(-CH =)四吡咯环大环的位置已经通过使用经改进的阿德勒方法的两步法合成。值得注意的是,目前的合成方案为我们提供了(P 4 )和(P 5 )的针状单晶,这有助于我们研究所制备的Trans-A 2 B 2卟啉的三维结构。使用Hirschfeld表面分析(HSs)可视化()的晶体结构的保真度P 4 )和(P 5 )。这种方法可以识别各种类型的分子间接触及其对晶体堆积的影响。分子由H⋅⋅H和C⋅⋅H触点组合而成,它们在相应的指纹图中具有清晰的签名。在中间苯基环的对位引入两种不同的非空间需求的功能对对称(A 4)卟啉的光学和热性质的影响。e。四对甲氧基苯基卟啉P 1 ,四对甲基苯基卟啉P 2 和四对氯苯基卟啉P 3 进行了研究,并对结果进行了详细讨论。
更新日期:2020-06-29
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