Charge transfer co-crystals based on donor–acceptor interactions for near-infrared photothermal conversion

Abstract

The charge transfer from the donor to the acceptor units results in a CT complex with excellent near-infrared photothermal conversion efficiency, which acted as an excellent photothermal material in seawater desalination application.

Water‐Soluble Organic Nanoparticles with Programable Intermolecular Charge Transfer for NIR‐II Photothermal Anti‐Bacterial Therapy

“…[35,37] And Zhaos group constructed another cocrystal based on the interaction of pyromellitic diimide (PMDI) units and tetrathiafulvalene (TTF). [38] So far, most reports of CTC are on bulk crystals with absorption in visible (280-700 nm) or NIR-I regions (700-1000 nm), which have limited tissue penetration depth in PTT. Thus, exploration of CTC involved PTT in the NIR-II window is still challenging but highly desirable.…”

“…Hence, there are only a handful of reports exploiting CTC material with the unusually NIR absorption. [35][36][37][38] Hus group reported a cocrys-tal of two small molecules based on D-A interactions to prepare NIR photothermal or photodetection materials. [35,37] And Zhaos group constructed another cocrystal based on the interaction of pyromellitic diimide (PMDI) units and tetrathiafulvalene (TTF).…”

Water‐Soluble Organic Nanoparticles with Programable Intermolecular Charge Transfer for NIR‐II Photothermal Anti‐Bacterial Therapy

“…Furthermore, the self‐assembly and crystallization processes are still unpredictable. Hence, there are only a handful of reports exploiting CTC material with the unusually NIR absorption [35–38] . Hu's group reported a cocrystal of two small molecules based on D‐A interactions to prepare NIR photothermal or photodetection materials [35, 37] .…”

“…Hu's group reported a cocrystal of two small molecules based on D‐A interactions to prepare NIR photothermal or photodetection materials [35, 37] . And Zhao's group constructed another cocrystal based on the interaction of pyromellitic diimide (PMDI) units and tetrathiafulvalene (TTF) [38] . So far, most reports of CTC are on bulk crystals with absorption in visible (280–700 nm) or NIR‐I regions (700–1000 nm), which have limited tissue penetration depth in PTT.…”

Hydrogen-Bonding-Induced H-Aggregation of Charge-Transfer Complexes for Ultra-Efficient Second Near-Infrared Region Photothermal Conversion

“…[32][33][34][35] Since Hu et al proposed the first photothermal conversion cocrystal, 36 CTC has been regarded as a promising PT material due to the fact that an effective charge transfer mechanism between the donor and the acceptor can narrow the band gap and produce a spectral redshift, therefore, increasing the absorption in the near-infrared region. [37][38][39] However, the majority of CTC-based PT materials that currently exist only work in the first near-infrared region (NIR-I, 700-1000 nm).…”