The performance of conjugated donor-π-Acceptor (D-π-A) sensitizers with the modification of thiophene auxiliary acceptors depends critically on their mesoscopic ordering that enables improved photon harvesting and charge transfer processes. This idea has been implemented here by reporting photocatalytic hydrogen production performance in the incremental order of 2691, 6641 and 7396 μmol g⁻¹ h⁻¹ by altering thiophene (LG-5) to thieno-thiophene (LG-tT) to dithieno- thiophene (LG-DtT) auxiliaries. New sensitizers, LG-tT and LG-DtT are making it possible to achieve an impressive power conversion efficiency of (PCE) of 8.25 % and 7.05 %, respectively in dye-sensitized solar cell applications. The high onset of Q-band absorption of both sensitizers (720−750 nm) is resulting in effective harvesting of sunlight. DFT studies suggest the photoexcited electron transfer process took place intramolecularly from donor phenothiazine to acceptor cyanoacrylic acid via porphyrin macrocycle. This strategy of molecular engineering at donor and acceptor fragments led to competitive results compared to many reported sensitizers for both DSSC and photocatalytic hydrogen generation.

经噻吩辅助受体修饰的共轭供体-π-受体（D-π-A）敏化剂的性能主要取决于其介观排列，从而改善了光子的收集和电荷转移过程。通过将噻吩（LG-5）转变为噻吩并噻吩（LG-tT）转变为二噻吩并噻吩，在此报告的光催化制氢性能按2691、6641和7396μmolg ^-1  h ^-1的递增顺序得到了实现。（LG-DtT）助剂。新型敏化剂LG-tT和LG-DtT使得在染料敏化太阳能电池应用中分别达到8.25％和7.05％的出色功率转换效率（PCE）成为可能。两种敏化剂（720-750 nm）的Q波段吸收都很高，因此可以有效地收获阳光。DFT研究表明，光激发电子转移过程是通过卟啉大环从供体吩噻嗪分子转移到受体氰基丙烯酸分子内发生的。与许多报道的用于DSSC和光催化制氢的敏化剂相比，这种在供体和受体片段上进行分子工程的策略导致了竞争结果。