Ultralong Room Temperature Phosphorescent Covalent Organic Framework Elastomers with Robust Mechanical Properties and High Elasticity

Jing Xu; Tian-ze Chen; Ming-chao Shao; Yun-long Guo; Xin-rui Zhang; Ting-mei Wang

doi:10.11777/j.issn1000-3304.24024

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Ultralong Room Temperature Phosphorescent Covalent Organic Framework Elastomers with Robust Mechanical Properties and High Elasticity

Research Article | 更新时间：2024-04-29

- Ultralong Room Temperature Phosphorescent Covalent Organic Framework Elastomers with Robust Mechanical Properties and High Elasticity
- Acta Polymerica Sinica Vol. 55, Pages: 709-717(2024)
- 作者机构：
  
  1.先进润滑与防护材料研究发展中心中国科学院兰州化学物理研究所兰州 730000
  2.北京分子科学国家研究中心中国科学院化学研究所中国科学院有机固体重点实验室北京 100190
  3.中国科学院大学北京 100049
- 作者简介：
  
  Ming-chao Shao, E-mail: shaomingchao@licp.cas.cn
  Yun-long Guo, E-mail: guoyunlong@iccas.ac.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.24024
  CLC：
- Published：20 June 2024，
  
  Published Online：29 April 2024，
  
  Received：20 January 2024，
  
  Accepted：26 March 2024
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徐静, 陈天泽, 邵明超, 郭云龙, 张新瑞, 王廷梅. 具有鲁棒性机械性能和高弹性的超长室温磷光共价有机框架弹性体. 高分子学报, 2024, 55(6), 709-717

Xu, J.; Chen, T. Z.; Shao, M. C.; Guo, Y. L.; Zhang, X. R; Wang, T. M. Ultralong room temperature phosphorescent covalent organic framework elastomers with robust mechanical properties and high elasticity. Acta Polymerica Sinica, 2024, 55(6), 709-717
徐静, 陈天泽, 邵明超, 郭云龙, 张新瑞, 王廷梅. 具有鲁棒性机械性能和高弹性的超长室温磷光共价有机框架弹性体. 高分子学报, 2024, 55(6), 709-717 DOI： 10.11777/j.issn1000-3304.24024.

Xu, J.; Chen, T. Z.; Shao, M. C.; Guo, Y. L.; Zhang, X. R; Wang, T. M. Ultralong room temperature phosphorescent covalent organic framework elastomers with robust mechanical properties and high elasticity. Acta Polymerica Sinica, 2024, 55(6), 709-717 DOI： 10.11777/j.issn1000-3304.24024.

摘要

开发具有持久稳定室温磷光的弹性体材料是柔性电子学和光子学领域的一大挑战. 本文报到了一种高度可拉伸、高机械强度且可持续发光的室温磷光共价有机框架弹性体(SPU-D230-UPy COF)材料. 该材料由烷基链软段与含多重氢键硬段限域共价有机框架而组成，展现出高的机械性能和高弹性. 在除去365 nm的激发后，具有明亮且持续的室温磷光发射特性(发光时间持续3.0 s). 力学研究表明，其具备约33.5 MPa的强度、约188.26 MJ/m

的优异韧性以及约76.6 MPa的杨氏模量. 同时该弹性体即使经历反复的机械变形也能保持优异的光学性能. 本研究为发光弹性体在可穿戴设备、柔性显示器和防伪设备等方面的应用奠定了基础.

Abstract

Elastomer materials with long-lasting and stable room-temperature phosphorescence have great potential in the fields of flexible electronics and photonics. However

developing such materials remains a daunting challenge. Systems of small molecule doped polymers are limited by the tensile properties of the polymer matrix. Currently commonly used polymethylmethacrylate (PMMA) and poly(vinyl alcohol) (PVA) have poor tensile properties. However

the increased flexibility cannot provide rigid external conditions for phosphorescence emission. This trade-off parameter adjustment has always hindered its development. Here

we report a highly stretchable and mechanically strong sustainable luminescent room-temperature phosphorescent covalent organic framework elastomer (SPU-D230-UPy COF) material. The material is

composed of an alkyl chain soft segment and a limited covalent organic framework containing multiple hydrogen bonding hard segments. This structural design of separated soft and hard segments provides the structural basis for high mechanical properties

high toughness

and phosphorescent emission. The soft segment structure can ensure its high stretchability

and the hard segment structure can provide high mechanical strength while also providing a rigid environment for phosphorescence emission. These prepared elastomers exhibit high mechanical properties and high elasticity

and exhibit bright and sustained luminescence after removal of 365 nm excitation (luminescence time lasts for 3.0 s). Mechanical studies show that the obtained material exhibits a strength of ∼33.5 MPa and excellent toughness of ∼188.26 MJ/m

with a Young's modulus of ∼76.6 MPa. The material can easily lift heavy objects without breaking. Impressively

these elastomers maintain strong optical properties even under repeated mechanical deformation

an unprecedented property. These outstanding properties make these long-lasting luminescent elastomers ideal for potential applications in wearables

flexible displays

and anti-counterfeiting devices. This separate structural design of soft and hard segments effectively breaks the trade-off between structural flexibility and phosphorescence emission. It can not only improve the mechanical properties

flexibility and stretchability of the material

but also effectively maintain the phosphorescence emission

which will provide a new path for the development of stretchable elastomer phosphorescent emissive materials.

关键词

弹性体共价有机框架超长室温磷光多重氢键

Keywords

ElastomerCovalent organic frameworkUltralong room temperature phosphorescenceMultiple hydrogen bonds

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Related Institution

先进润滑与防护材料研究发展中心中国科学院兰州化学物理研究所

北京分子科学国家研究中心中国科学院化学研究所有机固体院重点实验室

中国科学院大学

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Material Science and Engineering, Donghua University

South China Advanced Institute for Soft Matter Science and Technology, South China University Technology

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