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1. Donor–acceptor polymers with tunable infrared photoresponse

   https://doi.org/10.1039/C7PY00241F  

   London, Alexander E.; Huang, Lifeng; Zhang, Benjamin A.; Oviedo, M. Belén; Tropp, Joshua; Yao, Weichuan; Wu, Zhenghui; Wong, Bryan M.; Ng, Tse Nga; Azoulay, Jason D. (January 2017, Polym. Chem.)
2. Accelerating cationic polymerizations with a hydrogen bond donor

   https://doi.org/10.1016/j.eurpolymj.2024.112814  

   Shankel, Shelby L; Ma, Yuting; Spivey, Jesse A; Filien, Leila; Lambert, Tristan H; Fors, Brett P (March 2024, European Polymer Journal)

   Photoacid generators (PAGs) have facilitated a number of technology breakthroughs in the electronic, coating, and additive manufacturing industries. Traditionally, PAGs that contain weakly coordinating anions, such as PF6-, generate Brønsted superacids under UV irradiation for rapid cationic polymerizations. However, PAGs with strongly coordinating anions remain under-utilized as they form weak acids that are inefficient or even incapable of initiating polymerization. To expand the scope of potential counteranions in PAGs, we leveraged a thiophosphoramide hydrogen bond donor (HBD) to catalyze photoinitiated cationic polymerizations from diphenyliodonium PAGs. Through the formation of hydrogen bonds between the HBD and PAG counteranion, acceleration of the polymerization rate was observed for a range of non-coordinating and coordinating anions. The effect of the HBD on the polymerization kinetics was investigated by 1H-NMR titrations and geometry optimizations. Extending HBD catalysis beyond photopolymerizations, addition of HBD also enabled hydrochloric acid to initiate controlled reversible addition-fragmentation chain transfer (RAFT) polymerization under ambient conditions. With the versatility of HBD, there is potential to access initiation systems that were previously believed to be impractical for cationic polymerization. 

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3. Strong Triel Bonds with Be as Electron Donor

   https://doi.org/10.1021/acs.inorgchem.4c02186  

   Wang, Xin; Niu, Zhihao; Li, Qingzhong; Scheiner, Steve (August 2024, Inorganic Chemistry)
4. Impact of Classical and Quantum Light on Donor–Acceptor–Donor Molecules

   https://doi.org/10.1021/acs.jpclett.4c01948  

   Mandal, Haraprasad; Giri, Sajal Kumar; Jovanovski, Sara; Varnavski, Oleg; Zagorska, Malgorzata; Ganczarczyk, Roman; Chiang, Tse-Min; Schatz, George C; Goodson, Theodore (September 2024, The Journal of Physical Chemistry Letters)

   Investigations of entangled and classical two-photon absorption have been carried out for six donor (D)-acceptor(A)-donor(D) compounds containing the dithieno pyrrole (DTP) unit as donor and acceptors with systematically varied electronic properties. Comparing ETPA (quantum) and TPA (classical) results reveals that the ETPA cross section decreases with increasing TPA cross section for molecules with highly off-resonant excited states for single photon excitation. Theory (TDDFT) results are in semiquantitative agreement with this anticorrelated behavior, due to the dependence of the ETPA cross section but not TPA on the two-photon excited state lifetime. The largest cross section is found for a DTP derivative that has a single photon excitation energy closest to resonance with half the two-photon excitation energy. These results are important to the possible use of quantum light for low intensity energy conversion applications. 

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5. Coercing assembly of donor-acceptor complexes with hydrogen-bonded frameworks

   https://doi.org/10.1016/j.orgel.2023.106752  

   Yusov, Anna; Dillon, Alexandra M.; Hu, Chunhua T.; Lee, Stephanie S.; Ward, Michael D. (April 2023, Organic Electronics)