Chemical Research in Chinese Universities ›› 2025, Vol. 41 ›› Issue (6): 1348-1374.doi: 10.1007/s40242-025-5220-8

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Tailoring Molecular Architecture: Charge-transfer Cocrystals Based on TCNQ in Advanced Electrical, Magnetic, and Photo-thermal Applications

ZIKAR E ISLAM Muhammad, DU Shaolin, LI Tingting, SUN Shiyue, KE Yunzhe, JIA Bao, SUN Lingjie, ZHANG Xiaotao, DING Shuaishuai   

  1. State Key Laboratory of Advanced Materials for Intelligent Sensing, Key Laboratory of Organic Integrated Circuit, Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science & Institute of Molecular Aggregation Science, Tianjin University, Tianjin 300072, P. R. China
  • Received:2025-09-28 Accepted:2025-10-23 Online:2025-12-01 Published:2025-12-05
  • Contact: DING Shuaishuai,E-mail:dingshuaishuai@tju.edu.cn E-mail:dingshuaishuai@tju.edu.cn
  • Supported by:
    This work was supported by the National Key R&D Program, China (No. 2024YFA1209600) and the National Natural Science Foundation of China (Nos. 52373250, 52003190).

Abstract: The discovery of the first TCNQ-based charge-transfer (CT) cocrystal, which is composed of a tetrathiafulvalene (TTF) donor and 7,7,8,8-tetracyanoquinodimethane (TCNQ) acceptor (TTF-TCNQ), sparked a thorough investigation into the fabrication of novel CT cocrystals by combining TCNQ and its derivatives with different donor molecules. Due to the strong intermolecular interactions and tunable stacking modes, TCNQ-based cocrystals display unique properties, including ambipolar transport, low-temperature ferromagnetism, and red-shifted optical absorption. However, to achieve precise control of cocrystal growth, morphology, and electronic functionality remains a big challenge. In this review, we mainly focus on fundamental concepts of TCNQ-based CT cocrystals, such as types of interactions, stacking modes, methods for tuning properties, and techniques for growing high-quality crystals. Furthermore, their applications in electronics, magnetism, and emerging photothermal technologies, such as imaging, therapy, and desalination are highlighted.

Key words: Organic cocrystal, Charge-transfer, 7,7,8,8-Tetracyanoquinodimethane (TCNQ), Crystal engineering, Optoelectronics, Photothermal conversion