Controllable synthesis and spontaneous phase transition of photonic coordination polymer to produce a strong second-harmonic generation response

被引：20

作者：

Zhang, Jun ^{[1
]}

Abudoureheman, Maierhaba ^{[2
,4
,5
]}

Ma, Xiaofan ^{[3
]}

Kong, Weili ^{[1
]}

Xuan, Xiaopeng ^{[3
]}

Pan, Shilie ^{[4
,5
]}

机构：

[1] Anhui Jianzhu Univ, Sch Mat & Chem Engn, Hefei 230601, Peoples R China

[2] Xinjiang Univ, Coll Chem & Chem Engn, Key Lab Coal Clean Convers & Chem Engn Proc, Urumqi 830046, Peoples R China

[3] Henan Normal Univ, Sch Chem & Chem Engn, Key Lab Green Chem Media & React, Minist Educ,Collaborat Innovat Ctr Henan Prov Gre, Xinxiang 453007, Henan, Peoples R China

[4] Chinese Acad Sci, CAS Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China

[5] Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China

来源：

SCIENCE CHINA-MATERIALS | 2020年 / 63卷 / 07期

基金：

中国国家自然科学基金;

关键词：

second-harmonic generation; controllable synthesis; phase transition; crystal structure; single-crystal X-ray diffraction; NONLINEAR-OPTICAL CRYSTAL; ACHIRAL LIGAND; POLYMORPHISM; SERIES;

D O I：

10.1007/s40843-020-1281-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Herein, a novel photonic coordination polymer material was constructed by aggregation-induced emission luminogen (AIEgen) containing a tripyridyl moiety used as the linking ligand. It displayed a spontaneous direct centrosymmetric to noncentrosymmetric phase transition in a single crystal. The two crystals, before and after the phase transition, were both controllably synthesized and characterized by single-crystal X-ray diffraction. After being exposed to air, the centrosymmetric metastable phase (1-alpha) transitioned to a new stable phase with a noncentrosymmetric structure (1-beta). Interestingly, the 1-beta structure exhibited a strong phase-matching second-harmonic generation (SHG) response, about 4.5 times higher than that of KH2PO4 (KDP). In order to better understand the relationship between the structure and the nonlinear optical properties, the dipole moments were calculated and discussed. Remarkably, the noncentrosymmetric phase with high thermal stability for 1-beta retained and improved the initial photoluminescent properties of the AIEgen ligand after the structural phase transition from 1-alpha, and simultaneously produced the excellent SHG property, which are beneficial for the design and construction of excellent optical materials.

引用

页码：1272 / 1278

页数：7