Unravelling the excited state dynamics of monofunctionalized mono- and distyryl-BODIPY and perylenediimide dyads

Abstract

Designing new donor-acceptor systems and probing their energy/electron transfer dynamics is essential in the context of development of biomimetic photosynthetic systems. In this work, we have designed, synthesized and characterized...

NI-BODIPY-GO Nanocomposites for Targeted PDT

“…Two targeting units on the designed NI-BODIPYs ( 10 – 12 ) were provided by reacting distyryl BODIPYs 7 – 9 with a commercially available glucose derivative bearing azide under click reaction conditions in 25–29% yields. These yields are comparable to those observed in previous studies and can be attributed to the formation of mono-adducts in the reaction mixture, and the bis adducts were separated from the mono-adducts by column chromatography on silica gel . The structural properties of all new compounds were characterized by FT-IR, mass, 1 H and 13 C NMR spectroscopy techniques (Experimental Section, ESI Figures S1–S27).…”

“…These yields are comparable to those observed in previous studies and can be attributed to the formation of mono-adducts in the reaction mixture, and the bis adducts were separated from the monoadducts by column chromatography on silica gel. 46 The structural properties of all new compounds were characterized by FT-IR, mass, 1 H and 13 C NMR spectroscopy techniques (Experimental Section, ESI Figures S1−S27). The NMR spectra of all targeted compounds have characteristic signals for protons and carbons located at the BODIPY fragment.…”

Ultrafast symmetry-breaking charge separation in Perylenemonoimide-embedded multichromophores: impact of regioisomerism

“…Such global analysis of the fs-TA data enables a holistic understanding of the excited state dynamics by exploiting multiple spectrally overlapped signals and by examining these signals simultaneously, a comprehensive perspective of the behavior of the excited state can be obtained. 74 A two-step sequential model as shown in Fig. 6a , A → B → GS was employed to fit the excited-state photophysics of the monomer.…”

“…To delve deeper into the solvent-modulated excited state dynamics of various structural PMI-dimers/trimer, femtosecond transient absorption (fs-TA) measurements 73,74 were performed in solvents of varying polarities. The 2D contour of fs-TA data for each compound in CHCl 3 together with the corresponding steady-state and pump-probe laser spectra are shown in Fig.…”

Ultrafast Photoinduced Dynamics of Styryl-Substituted BODIPY Dyes and Their Aggregates

“…40 Ultrafast dynamics of an N-BODIPY compound were studied by Doria et al 41 Rani et al studied mono-and distyryl-substituted BODIPYs and their dyads involving perylene diimide. 36 Lee et al investigated ultrafast solvation dynamics and vibrational coherences of halogenated boron dipyrromethene derivatives using two-dimensional electronic spectroscopy. 42 Ultrafast singlet fission (∼30 fs) in BODIPY thin films and crystals has been reported by Zhou et al 43 Apart from these, few studies elucidated photoinduced dynamics of covalently linked BODIPY dimers, 44−46 while less attention has been paid to the excited-state dynamics of noncovalent dimers of BODIPY.…”