Covalent Organic Framework for Efficient Two-Photon Absorption

被引：77

作者：

Zhang, Liang ^{[1
,2
]}

Zhou, Yi ^{[1
,7
]}

Jia, Mei ^{[3
]}

He, Yiwen ^{[1
]}

Hu, Wei ^{[4
]}

Liu, Qi ^{[1
]}

Li, Jing ^{[5
]}

Xu, Xiaohui ^{[1
]}

Wang, Chao ^{[1
]}

Carlsson, Anna ^{[6
]}

Lazar, Sorin ^{[6
]}

Meingast, Arno ^{[6
]}

Ma, Yanhang ^{[7
]}

Xu, Jun ^{[8
]}

Wen, Wen ^{[9
]}

Liu, Zhihong ^{[4
]}

Cheng, Jun ^{[3
]}

Deng, Hexiang ^{[1
,2
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Key Lab Biomed Polymers, Minist Educ, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

[3] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China

[4] Wuhan Univ, Coll Chem & Mol Sci, Key Lab Analyt Chem Biol & Med, Minist Educ, Wuhan 430072, Peoples R China

[5] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Photochem Convers & Optoelect Mat, Beijing 100190, Peoples R China

[6] Thermo Fisher Sci Mat & Struct Anal, Achtseweg Noord 5, NL-5651 GG Eindhoven, Netherlands

[7] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[8] Chinese Acad Sci, Natl Ctr Magnet Resonance Wuhan, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China

[9] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

来源：

MATTER | 2020年 / 2卷 / 04期

基金：

国家重点研发计划; 中国国家自然科学基金; 美国国家科学基金会;

关键词：

EXCITATION; CONSTRUCTION; CRYSTALLINE;

D O I：

10.1016/j.matt.2020.01.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the collective alignment of molecular chromophores in the backbone of covalent organic frameworks (COFs) as a new chemical approach to construct efficient two-photon absorption (2PA) materials. Six imine COFs were synthesized from aldehyde-terminated triarylamine linkers and p-phenylenediamine. Attainment of these COFs in single-crystal form revealed the underlying layered structures and precise spatial arrangements of the constituent chromophores including an unusual serrated packing between the layers. Coherent orientation of chromophores within each layer made possible collective alignment of their transition dipoles, while the serrated packing between the layers maximized the crystal anisotropy. As a result, the full potential of molecular chromophores for 2PA was developed. Up to 110-fold enhancement of two-photon action cross-section (2PACS) was achieved for the COFs relative to their constituents, with one member exhibiting a high 2PACS value of 8,756 GM/chromophore-standing among the best molecule-based 2PA materials.

引用

页码：1049 / 1063

页数：15

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