%AYu, Zhanqian%AUthe, Brian%AGelfand, Rachel%APelton, Matthew%APtaszek, Marcin%Anull Ed.%BJournal Name: Journal of Porphyrins and Phthalocyanines %D2021%I %JJournal Name: Journal of Porphyrins and Phthalocyanines %K %MOSTI ID: 10280852 %PMedium: X %TWeakly conjugated bacteriochlorin-bacteriochlorin dyad: Synthesis and photophysical properties %XDyads 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. %0Journal Article