Application of a reversible thermochromic Co-MOF in smart windows†

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-01-29 DOI:10.1039/D4DT03423F

Xuan Yang, Zesen Yu, Hedong Jiang, Huanhuan Guo, Jian Sun, Jiake Li, Hua Zhu, Yanxiang Wang and Pingchun Guo

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Abstract

Metal–organic frameworks (MOFs) are promising candidates for thermochromic materials. In this study, a hydrogen-bonded 3D porous metal–organic framework, Co-BTC (Co₃(BTC)₂·12H₂O, BTC = 1,3,5-benzenetricarboxylate), exhibited a pink color at room temperature, attributed to the d–d transition of Co²⁺ ions within the framework, and displayed reversible thermochromic behavior due to alterations in the coordination environment of Co²⁺ ions. Additionally, Co-BTC/PVB thermochromic film was successfully designed and fabricated as a smart window with a monolayer structure. The window exhibited reversible thermochromic behavior comparable to Co-BTC, with visible transmittance modulation of 10.73%, near-infrared transmittance modulation of 25.87%, and solar transmittance modulation of 12.63%. Compared to a pure PVB window, the smart window reduced indoor temperatures by 5.7 °C in field tests, indicating a significant energy-saving effect. This research presents a potential application for the rational design of MOFs in the development of advanced smart windows.

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可逆热致变色Co-MOF在智能窗中的应用

金属-有机骨架（mof）是热致变色材料的重要候选材料。在本研究中，一种氢键三维多孔金属-有机框架Co-BTC（Co3(BTC)2·12H2O, BTC = 1,3,5-苯三羧酸）在室温下呈现粉红色，这是由于框架内Co2+离子的d-d跃迁，并且由于Co2+离子配位环境的改变而表现出可逆的热致变色行为。此外，还成功地设计并制作了Co-BTC/PVB热致变色膜作为单层结构的智能窗。该窗口具有与Co-BTC相当的可逆热致变色行为，可见光透过率调制为10.73%，近红外透过率调制为25.87%，太阳透过率调制为12.63%。在现场测试中，与纯PVB窗相比，智能窗的室内温度降低了5.7℃，节能效果显著。本研究为mof的合理设计在高级智能窗的开发中提供了潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.