Rodriguez-Alba, Efrain published the artcileDesign of novel well-defined oligothiophenes bearing donor-acceptor groups (pyrene-porphyrin): Synthesis, characterization, optical properties and energy transfer, Quality Control of 239075-02-6, the publication is Journal of Molecular Structure (2019), 28-36, database is CAplus.
Novel thiophene monomers containing porphyrin units attached via di(ethylene glycol) and tetra(ethylene glycol) spacers were synthesized: 3-methyl-4-(4-(1-(5-phenyl-10,15,20-triphenylporphyrin)) diethoxy) thiophene (M2PPh) and 3-methyl-4-(4-(1-(5-phenyl-10,15,20-triphenylporphyrin)) tetraethoxy) thiophene (M4PPh). These monomers and other co-monomers with pyrene units 3-methyl-4-(diethoxy) thiophene (M2) and 3-methyl-4-(tetraethoxy) thiophene (M4) previously reported by us, were linked to thiophene and bithiophene via a Suzuki coupling reaction to give the corresponding terthiophenes and quaterthiophenes: [3-diethoxypyrene, 3-diethoxyporphyrin, 4,4”’ di-Me – 2,2:5’2″- terthiophene (TT2PY-PPh)], [3-tetraethoxypyrene, 3-tetraethoxyporphyrin, 4, 4”’dimethyl-2,2:5’2″-terthiophene (TT4PY-PPh)], [3′-diethoxypyrene, 3′-diethoxyporphyrin, 4,4”’methyl-2,2′:5′:2”:5”,2”’-quaterthiophene (QT2PY-PPh)], and [3′-tetraethoxypyrene, 3′-tetraethoxyporphyrin,4,4”’methyl-2,2′:5′:2”:5”,2”’-quaterthiophene (QT4PY-PPh)]. The synthesized compounds were characterized by 1H NMR, 13C NMR and MALDI-TOF mass spectrometry; their optical properties were studied by absorption and fluorescence spectroscopy. The emission spectra of the oligothiophenes bearing pyrene-porphyrin units showed a significant decrease in the pyrene monomer emission and the appearance of a new emission band at 650 nm, arising from the porphyrin, which revealed that a FRET phenomenon is occurring from the excited pyrene to the porphyrin. The obtained FRET efficiencies were between 93 and 98% depending on the oligomer structure.
Journal of Molecular Structure published new progress about 239075-02-6. 239075-02-6 belongs to alcohols-buliding-blocks, auxiliary class Thiophene,Boronic acid and ester,Boronate Esters, name is 5,5′-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,2′-bithiophene, and the molecular formula is C20H28B2O4S2, Quality Control of 239075-02-6.
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