Two subphthalocyanine (SubPc)-based conjugated porous polymers, SubPc-P1 and SubPc-P2, have been designed and synthesized by an A3 + B2 and A4 + B2 type Sonogashira cross-coupling reaction, in which axial coupling is absent and present, respectively. These two polymers exhibit Brunauer–Emmett–Teller surface areas of 434 m2 g−1 and 106 m2 g−1, respectively. Combining their porosity with strong light harvesting capability, SubPc-P1 and SubPc-P2 can efficiently absorb long-wavelength photons even in the near-infrared region to generate singlet oxygen rapidly. In addition, compared with SubPc-P2, SubPc-P1 shows red-shifted light absorption and a larger specific surface area, which agrees well with the better singlet oxygen generation ability upon irradiation at 690 nm.
A series of subphthalocyanines with different substituents (RPhO-BSubPc(COOCH 3 ) 3 ) have been synthesized and used as catalysts to catalyze lithium/thionyl chloride (Li/SOCl 2 ) battery. All the compounds are structurally characterized by IR, UV, and element analysis. After adding RPhO-BSubPc(COOCH 3 ) 3 into the battery’s electrolyte, the energy and the capacity of the battery are increased by approximately 3.27–40.6 and 10.9–53.2 % than that of the battery in the absence of them. In addition, a three-step hypothetical mechanism is figured out to explain the complex catalytic process. By comparing the images of SEM, it is found that the addition of catalysts makes the lithium chloride layer looser, which is conducive to the transfer of electrons. Moreover, the hypothetical mechanism is confirmed by the results of cyclic voltammetry.
Constructing S -scheme heterojunctions serves as a potent approach to boost photocatalytic efficiency by promoting charge transfer and attaining elevated redox potentials. Herein, a novel axially substituted subphthalocyanine derivative, H 12 SubPc-Oph-tBu (SubPc-tBu), was synthesized and assembled onto cobalt-doped ZnS (Co-ZnS) via supramolecular self-assembly to form a unique S -scheme heterojunction (SubPc-tBu/Co-ZnS). In this system, the electron-rich SubPc-tBu unit, in conjunction with the incorporated cobalt (Co), is pivotal in promoting charge transfer and enhancing the photocatalytic efficiency of the heterojunction. The photocatalyst achieved a 97 % degradation efficiency of furantoin (FT) within 30 minutes, with an apparent rate constant that is 17.24 times higher than ZnS and 10.35 times greater than SubPc-tBu, demonstrating its superior photocatalytic performance. Furthermore, after five consecutive cycles, it retained a degradation efficiency of 83.36 %, highlighting its excellent stability and recyclability. Experimental and theoretical studies revealed that the enhanced photocatalytic activity arises from an interfacial charge transfer mechanism improving carrier separation and transfer. Time-dependent density functional theory (TDDFT) and LC-MS coupled with DFT elucidated electron transfer pathways and pollutant degradation mechanisms, offering insights into photocatalyst design for environmental pollution solutions.
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