Journal ArticleWeakly conjugated bacteriochlorin-bacteriochlorin dyad: Synthesis and photophysical propertiesYu, Zhanqian; Uthe, Brian; Gelfand, Rachel; Pelton, Matthew; Ptaszek, MarcinnullDyads containing two near-infrared absorbing and emitting bacteriochlorins with distinct spectral properties have been prepared and characterized by absorption, emission, and transient-absorption spectroscopies. The dyads exhibit ultrafast ([Formula: see text]3 ps) energy transfer from the bacteriochlorin with the higher-energy S 1 state to the bacteriochlorin emitting at the longer wavelength. The dyads exhibit strong fluorescence and relatively long excited state lifetimes ([Formula: see text]4 ns) in both non-polar and polar solvents, which indicates negligible photoinduced electron transfer between the two bacteriochlorins in the dyads. These dyads are thus attractive for the development of light-harvesting arrays and fluorophores for in vivo bioimaging.2021-06-0110280852Journal of Porphyrins and PhthalocyaninesA to J1088-4246https://doi.org/10.1142/S10884246215007111955318National Science Foundation