153033-31-9Relevant articles and documents
Sterically encumbered bipyridyl-derivatized conjugated polymers and metallopolymers incorporating phenylenevinylene, phenyleneethynylene, and fluorenylene segments
He, Susan,Buelt, Ashley A.,Hanley, Jessica M.,Morgan, Brad P.,Tennyson, Andrew G.,Smith, Rhett C.
, p. 6344 - 6352 (2012)
This work reports the preparation of a series of 2,2′-bipyridyl (bipy) modified π-conjugated polymers having an average of one or three monomer units (p-arylene ethynylene for PPE1 and PPE3 or 7,7-dihexylfluorene for PF1 and PF3) between metal-binding sites. Spectroscopic data demonstrate that strategic placement of sterically encumbered mesityl groups about the metal binding sites enforces a 1:1 metal to bipy binding ratio. This steric coordination control ensures that the metalated polymers remain solution processable rather than forming insoluble networks via coordinative cross-linking. The solution photophysical and electrochemical properties of metal-free and metalated materials are reported and compared with those of related conjugated polymers and conducting metallopolymers.
Linker-Dependent Singlet Fission in Tetracene Dimers
Korovina, Nadezhda V.,Joy, Jimmy,Feng, Xintian,Feltenberger, Cassidy,Krylov, Anna I.,Bradforth, Stephen E.,Thompson, Mark E.
supporting information, p. 10179 - 10190 (2018/07/30)
Separation of triplet excitons produced by singlet fission is crucial for efficient application of singlet fission materials. While earlier works explored the first step of singlet fission, the formation of the correlated triplet pair state, the focus of
Alkyloxy substituted organic dyes for high voltage dye-sensitized solar cell: Effect of alkyloxy chain length on open-circuit voltage
Ko, Soo-Byung,Cho, An-Na,Kim, Mi-Jeong,Lee, Chang-Ryul,Park, Nam-Gyu
experimental part, p. 88 - 98 (2012/04/04)
Three novel organic dyes (SB1, SB2, and SB3) containing 4-(hexyloxy)-N-(4-(hexyloxy)phenyl)-N-phenylaniline as electron donor and cyanoacrylic acid as electron acceptor bridged by alkyloxy (methyl = SB1, propyl = SB2 and hexyl = SB3) substituted p-phenylenevinylene linkers have been synthesized. Density functional theory (DFT) has employed to study electron distribution and intramolecular charge transfer. Increase in alkyl chain length in alkyloxy substituent leads to increase in open-circuit voltage (V OC), which is found to be related to the increased electron lifetime at open-circuit condition. Under AM 1.5 G 1 sun light illumination (100 mW/cm2), an optimized SB3-sensitized cell show a short-circuit photocurrent density (JSC) of 12.83 mA/cm2, an open-circuit voltage (VOC) of 0.745 V and a fill factor (FF) of 0.64, corresponding to an overall conversion efficiency (η) of 6.12%. Little degradation in η observed over 40 days is indicative of long-term stability of the SB-series dyes.