Triphenylamine monomers

We have shown via absorption, PL, morphology-dependent PL, PDS, photoluminescence excitation, and time-resolved photoluminescence spectroscopy that exciplexes form at the PFB F8BT heterojunction. We note that exciplexes of poly-fluorenes with triphenylamine monomers have been observed recently [34]. 

It has been suggested in the literature that the a-amino radical is the species that initiates polymerization [210], This view is supported by our observation that, in spite of the relatively high quenching rate constant of Eosin triplet by triphenylamine (Table 5), the system Eosin-triphenylamine does not sensitize the photopolymerization of multifunctional acrylates. Thus, it is necessary that the amine contains a hydrogen at the a-carbon to be released as a proton after oxidation of the amine by the dye triplet. This deprotonation prevents the back electron transfer and forms a carbon radical that is sufficiently long-lived to be captured by the monomer. 

In order to vary the HOMO offset at the D-A heterojunction as well as the hole mobility of the donor block, we also prepared substituted triphenylamine and tetraphenylbenzidine (TPD) monomers with two methoxy substituents [50, 51]. 

Further study about hydrocarbons/water separation was made by Yang et while using 4,4-bis(chloromethyl)biphenyl incorporated with triphenylamine. By changing the monomer ratio, a series of hypercrosslinked polymers were obtained with high surface areas and a predominantly microporous structure. With apparent BET surface areas of 1362 m g for PBP-N-25 and 1338 m g for PBP-N-50, the benzene/water vapor selectivity was as high as 53.5 and 63.6, respectively. Moreover, a monolithic polymer (M-PBP-N-25) was prepared with an apparent BET surface area of 551 m g. Owing to its hydrophobic nature and low density, the monolith showed the potential for applications in oil spill cleanup operations. 

Figure 10. Monomers and oligomers of poly(/)-phenylenevinylene) including triphenylamine and the rate constants for the electron-transfer process with in benzonitrile via the triplet excited 60-...

Liou GS, Lin KH (2009) Synthesis and characterization of a novel electrochromic aromatic polyamide from AB-type triphenylamine-based monomer. J Polym Sci Part A Polym Chem 47 1988-2001... 

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