@article{tran_wang_matsumoto_liu_jing_nalaoh_nguyen_taniguchi_lindsey_2023, title={Bacteriochlorin syntheses - Status, problems, and exploration}, volume={8}, ISSN={["1099-1409"]}, url={https://doi.org/10.1142/S1088424623501171}, DOI={10.1142/S1088424623501171}, abstractNote={ Bacteriochlorins – Nature’s near-infrared (NIR) chromophores – are distinguished by an intense ([Formula: see text] ∼;105 M[Formula: see text]cm[Formula: see text] long-wavelength absorption band in the ∼;700–1000 nm. The development of routes to prepare synthetic, tailorable bacteriochlorins holds promise for multiple disciplines where NIR-light-promoted photoactivity is of interest. A de novo route to bacteriochlorins equipped with a stabilizing gem-dimethyl group in each pyrroline ring was discovered in 2003. Continued development in this arena over 20 years has led to additional routes as well as methods to install substituents at selected positions about the perimeter of the macrocycle. The present paper reports studies that highlight substantial limitations of existing synthetic routes, including stymied access to multi-bacteriochlorin arrays and the inability to install (in a rational way) distinct groups at opposite sides of the macrocycle. The origins of the limitations are traced to particular stages of the chemistry ranging from derivatizing pyrroles, creating pyrrolines, constructing and elaborating dihydrodipyrrins, coupling dihydrodipyrrins, and forming macrocycles. Through exploration of a dozen aspects of bacteriochlorin syntheses, 60 new compounds (and nine known compounds via improved syntheses) have been prepared and characterized; the data include 20 single-crystal X-ray diffraction analyses. The research taken together points to areas of focus to fulfill the promise of this fascinating class of compounds. }, journal={JOURNAL OF PORPHYRINS AND PHTHALOCYANINES}, author={Tran, Vy-Phuong and Wang, Pengzhi and Matsumoto, Nobuyuki and Liu, Sijia and Jing, Haoyu and Nalaoh, Phattananawee and Nguyen, Khiem Chau and Taniguchi, Masahiko and Lindsey, Jonathan S.}, year={2023}, month={Aug} }
 @article{roy_magdaong_jing_rong_diers_kang_niedzwiedzki_taniguchi_kirmaier_lindsey_et al._2022, title={Balancing Panchromatic Absorption and Multistep Charge Separation in a Compact Molecular Architecture br}, volume={12}, ISSN={["1520-5215"]}, url={https://doi.org/10.1021/acs.jpca.2c06040}, DOI={10.1021/acs.jpca.2c06040}, abstractNote={A panchromatic triad and a charge-separation unit are joined in a crossbar architecture to capture solar energy. The panchromatic-absorber triad (T) is comprised of a central free-base porphyrin that is strongly coupled via direct ethyne linkages to two perylene-monoimide (PMI) groups. The charge-separation unit incorporates a free-base or zinc chlorin (C or ZnC) as a hole acceptor (or electron donor) and a perylene-diimide (PDI) as an electron acceptor, both attached to the porphyrin via diphenylethyne linkers. The free-base porphyrin is common to both light-harvesting and charge-separation motifs. The chlorin and PDI also function as ancillary light absorbers, complementing direct excitation of the panchromatic triad to produce the discrete lowest excited state of the array (T*). Attainment of full charge separation across the pentad entails two steps: (1) an initial excited-state hole/electron-transfer process to oxidize the chlorin (and reduce the panchromatic triad) or reduce the PDI (and oxidize the panchromatic triad); and (2) subsequent ground-state electron/hole migration to produce oxidized chlorin and reduced PDI. Full charge separation for pentad ZnC-T-PDI to generate ZnC+-T-PDI- occurs with a quantum yield of ∼30% and mean lifetime ∼1 μs in dimethyl sulfoxide. For C-T-PDI, initial charge separation is followed by rapid charge recombination. The molecular designs and studies reported here reveal the challenges of balancing the demands for charge separation (linker length and composition, excited-state energies, redox potentials, and medium polarity) with the constraints for panchromatic absorption (strong electronic coupling of the porphyrin and two PMI units) for integrated function in solar-energy conversion.}, number={50}, journal={JOURNAL OF PHYSICAL CHEMISTRY A}, author={Roy, Arpita and Magdaong, Nikki Cecil M. and Jing, Haoyu and Rong, Jie and Diers, James R. and Kang, Hyun Suk and Niedzwiedzki, Dariusz M. and Taniguchi, Masahiko and Kirmaier, Christine and Lindsey, Jonathan S. and et al.}, year={2022}, month={Dec} }
 @article{jing_liu_jiang_tran_rong_wang_lindsey_2022, title={Meso bromination and derivatization of synthetic bacteriochlorins}, volume={46}, ISSN={["1369-9261"]}, DOI={10.1039/d1nj05853c}, abstractNote={Twelve bacteriochlorin building blocks featuring meso-substitution have been prepared including a set with finely tuned long-wavelength absorption (725–757 nm) for studies in photonics.}, number={12}, journal={NEW JOURNAL OF CHEMISTRY}, author={Jing, Haoyu and Liu, Sijia and Jiang, Jianbing and Tran, Vy-Phuong and Rong, Jie and Wang, Pengzhi and Lindsey, Jonathan S.}, year={2022}, month={Mar}, pages={5556–5572} }
 @misc{jing_rong_taniguchi_lindsey_2022, title={Phenylene-linked tetrapyrrole arrays containing free base and diverse metal chelate forms - Versatile synthetic architectures for catalysis and artificial photosynthesis}, volume={456}, ISSN={["1873-3840"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85122467651&partnerID=MN8TOARS}, DOI={10.1016/j.ccr.2021.214278}, abstractNote={Tetrapyrrole macrocycles are central to photosynthesis yet a single macrocycle does not carry out photosynthesis; rather, assemblies of tetrapyrrole macrocycles work in concert in antenna complexes, reaction centers, and electron-transport chains to harvest sunlight, funnel excited-state energy and separate charge for biological use. A longstanding theme in artificial photosynthesis has been to construct covalently linked “arrays” of metalated and free base tetrapyrrole macrocycles for fundamental studies of such processes, which entail excited-state and ground-state interactions. Among linkers in arrays chemistry, the 1,2-, 1,3-, or 1,4-disubstituted phenylene unit has proved very attractive owing to the resulting short distance, defined architecture, and appropriate extent of electronic coupling of adjacent macrocycles to give rapid electron and/or energy transfer while largely retaining desired spectral features. Eight distinct strategies to construct phenylene-linked tetrapyrrole arrays are identified in a review with comprehensive coverage since inception in the early 1970s through mid-year 2021. The arrays predominantly incorporate porphyrins with very few chlorins and bacteriochlorins, reflecting historic availability of synthetic methods for macrocycle formation. Of the eight strategies, only two appear applicable to (bacterio)chlorins. While studies in artificial photosynthesis have largely fueled this field, applications in catalysis have also been examined. Altogether >400 arrays are covered. The review delves into synthesis and molecular design, sketches photophysical properties, and suggests unrealized opportunities in arrays chemistry.}, journal={COORDINATION CHEMISTRY REVIEWS}, author={Jing, Haoyu and Rong, Jie and Taniguchi, Masahiko and Lindsey, Jonathan S.}, year={2022}, month={Apr} }
 @article{jing_wang_chen_jiang_vairaprakash_liu_rong_chen_nalaoh_lindsey_2022, title={Synthesis of bacteriochlorins bearing diverse beta-substituents}, volume={3}, ISSN={["1369-9261"]}, DOI={10.1039/d1nj05852e}, abstractNote={Eleven bacteriochlorins have been prepared for surface attachment, bioconjugation, water-solubilization, vibrational studies, and elaboration into multichromophore arrays.}, journal={NEW JOURNAL OF CHEMISTRY}, author={Jing, Haoyu and Wang, Pengzhi and Chen, Boyang and Jiang, Jianbing and Vairaprakash, Pothiappan and Liu, Sijia and Rong, Jie and Chen, Chih-Yuan and Nalaoh, Phattananawee and Lindsey, Jonathan S.}, year={2022}, month={Mar} }
 @article{fujita_jing_krayer_allu_veeraraghavaiah_wu_jiang_diers_magdaong_mandal_et al._2019, title={Annulated bacteriochlorins for near- infrared photophysical studies}, volume={43}, ISSN={["1369-9261"]}, DOI={10.1039/c9nj01113g}, abstractNote={Bacteriochlorins with phenaleno or benzo annulation absorb at 913 or 1033 nm and exhibit excited-state lifetimes of 150 or 7 ps, suggesting applications in photoacoustic imaging.}, number={19}, journal={NEW JOURNAL OF CHEMISTRY}, author={Fujita, Hikaru and Jing, Haoyu and Krayer, Michael and Allu, Srinivasarao and Veeraraghavaiah, Gorre and Wu, Zhiyuan and Jiang, Jianbing and Diers, James R. and Magdaong, Nikki Cecil M. and Mandal, Amit K. and et al.}, year={2019}, month={May}, pages={7209–7232} }