@article {48771,
	title = {Donor strapped perylene bisimide macrocycle and its lemniscate dimer with extended charge separation},
	journal = {Inorganic Chemistry Frontiers},
	volume = {10},
	year = {2023},
	month = {OCT },
	pages = {5099-5107},
	type = {Article},
	abstract = {<p>
	Macrocyclic structures are fascinating due to their unique design and capability to place chromophores in specific orientations, resulting in exciting optoelectronic properties. However, the synthetic challenges limit the broad exploration of such systems. Herein, we report a thiophene-diacetylene-based ring strapped perylene bisimide macrocycle and its notably different electron transfer features. Single-crystal analysis of the macrocycle pointed to the nearly orthogonal placement of donor-acceptor units, facilitating better electronic communication between them. Interestingly, introduction of an alkyl substituent on the peripheral thiophene ring opened the possibility of forming a higher oligomer macrocycle consisting of two strapped perylene bisimide units. Diffusion and two-dimensional NMR experiments provided insight into the structure of the figure-eight-shaped lemniscate dimer. Transient absorption measurements showed faster electron transfer and extended stabilization of the charge-separated state. The thiophene-diacetylene-based ring is a better donor unit to facilitate rapid electron transfer and extended charge separation in the macrocycle and its lemniscate dimer. The new macrocycle design enables the formation of higher analogs equally capable of stabilizing the charge-separated state. Donor-acceptor (D-A) macrocycle designs position the respective units to achieve ultrafast electron transfer precisely and an extended charge-separated state. Here, we report a D-A macrocycle and its lemniscate dimer molecule with exciting electron transfer features.</p>
},
	issn = {2052-4129},
	doi = {10.1039/d3qo01060k},
	author = {Veer, Sairam Dnyaneshwar and Goswami, Tanmay and Ravindranathan, Sapna and Gonnade, Rajesh and Kharbanda, Nitika and Ghosh, Hirendra N. and Babu, Sukumaran Santhosh}
}
@article {48451,
	title = {Oligothiophene-ring-strapped perylene bisimides: functionalizable coaxial donor-acceptor macrocycles},
	journal = {Angewandte Chemie-International Edition},
	volume = {62},
	year = {2023},
	month = {JAN},
	type = {Article},
	abstract = {<p>
	Aesthetic designs from nature enable new knowledge to be gained and, at the same time, inspire scientific models. In this context, multicomponent macrocycles embody the advantage of precisely positioning the structural units to achieve efficient communication between them. However, the construction of a functionalizable macrocycle for ultrafast charge separation and stabilization has not been attempted. Herein, we report the synthesis, crystal structure, and transient absorption of a new functionalizable macrocycle consisting of an oligothiophene-ring-strapped perylene bisimide. Transient absorption results point to a sequential improvement in charge separation and stabilization from the macrocycle to the corresponding linear dimer and 2D polymer due to the unique design. Our macrocycle design with a supportive spatial arrangement of the donor and acceptor units will inspire the development of more complex synthetic systems with exciting electron-transfer and charge-separation features.</p>
},
	keywords = {Charge Separation, Donor-Acceptor Systems, Electron Transfer, Macrocycles, Perylene Bisimides},
	issn = {1433-7851},
	doi = {10.1002/anie.202212934},
	author = {Dnyaneshwar Veer, Sairam and Chandrakant Wakchaure, Vivek and Asokan, Kiran and Dixit, Ruchi and Goswami, Tanmay and Saha, Ramchandra and Gonnade, Rajesh and Ghosh, Hirendra N. and Santhosh Babu, Sukumaran}
}
