Department of Chemistry, School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar-24, Odisha, India.
Institute for Integrative Nanosciences, IFW-Dresden, 01069, Dresden, Germany.
Chem Commun (Camb). 2019 Sep 21;55(74):11025-11028. doi: 10.1039/c9cc05415d. Epub 2019 Aug 27.
Porphyrin-based porous organic frameworks are an important group of materials gaining interest due to their structural diversity and distinct opto-electronic properties. However, these materials are seldom explored for nonlinear optical (NLO) applications. In this work, we investigate a thiazolo[5,4-d]thiazole-bridged porous, porphyrin framework (Por-TzTz-POF) with promising NLO properties. The planar TzTz moiety coupled with integrated porphyrin units enables efficient π-conjugation and charge distribution in the Por-TzTz-POF resulting in a high nonlinear absorption coefficient (β = 1100 cm GW) with figure of merit (FoM) σ/σ = 5571, in contrast to analogous molecules and material counterparts e.g. metal-organic frameworks (MOFs; β = ∼0.3-0.5 cm GW), molecular porphyrins (β = ∼100-400 cm GW), graphene (β = 900 cm GW), and covalent organic frameworks (Por-COF-HH; β = 1040 cm GW and FoM = 3534).
基于卟啉的多孔有机骨架因其结构多样性和独特的光电性能而成为一类备受关注的材料。然而，这些材料很少被探索用于非线性光学（NLO）应用。在这项工作中，我们研究了一种具有良好 NLO 性能的噻唑并[5,4-d]噻唑桥连多孔卟啉骨架（Por-TzTz-POF）。平面 TzTz 部分与集成的卟啉单元相结合，使得 Por-TzTz-POF 中能够实现有效的π 共轭和电荷分布，从而导致高非线性吸收系数（β=1100 cm GW），其品质因数（FoM）σ/σ=5571，与类似的分子和材料相比，例如金属-有机骨架（MOFs；β=∼0.3-0.5 cm GW）、分子卟啉（β=∼100-400 cm GW）、石墨烯（β=900 cm GW）和共价有机骨架（Por-COF-HH；β=1040 cm GW 和 FoM=3534）。
