TY - JOUR
T1 - The first example of bis(indolyl)methane based hyperbranched polyurethanes
T2 - Synthesis, solar cell application and anti-bacterial and anti-oxidant properties
AU - Sathiyaraj, Subramaniyan
AU - Shanavas, A.
AU - Kumar, K. Ashok
AU - Sathiyaseelan, A.
AU - Senthilselvan, J.
AU - Kalaichelvan, P. T.
AU - Nasar, A. Sultan
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/10
Y1 - 2017/10
N2 - Two new AB2-type blocked-isocyanate monomers containing bis(indolyl)methane moiety were synthesized via a scalable synthetic routes. Except the “A” functional groups, both of the monomers are structurally identical; one was designed with phenolic [sbnd]OH group (Monomer-1) and the other one was designed with alcoholic [sbnd]OH group (Monomer-2). The first examples of indole based hyperbranched polyurethanes were derived from these monomers in DMF and THF solvents. Blocked-isocyanate end-groups of these polymers were modified with PEG-mono methyl ether. The structures of the AB2-type monomers and their intermediates were confirmed using FT-IR, 1H NMR, and 13C NMR spectroscopy. The formation of hyperbranched polyurethanes and their end-group modifications were confirmed using 1H NMR spectra. The absolute molecular weights of the polymers were determined using SEC-MALLS technique and the values were found to be varied from 6.8 × 103 g/mole to 1.1 × 105 g/mole. The diverse functions of all the synthesised polymers were studied. Dye-sensitized solar cells (DSSC) fabricated with a polymer derived from Monomer-2 (InHBPU-5) yielded an overall energy conversion efficiency of η = 6.59% upon 1 sun illumination with visible light. Also, this polymer showed activity almost equal to tetracycline (control) toward both gram-positive and gram-negative bacterial strains. In addition, this polymer and its monomer, both exhibited good capacity for scavenging DPPH free radical.
AB - Two new AB2-type blocked-isocyanate monomers containing bis(indolyl)methane moiety were synthesized via a scalable synthetic routes. Except the “A” functional groups, both of the monomers are structurally identical; one was designed with phenolic [sbnd]OH group (Monomer-1) and the other one was designed with alcoholic [sbnd]OH group (Monomer-2). The first examples of indole based hyperbranched polyurethanes were derived from these monomers in DMF and THF solvents. Blocked-isocyanate end-groups of these polymers were modified with PEG-mono methyl ether. The structures of the AB2-type monomers and their intermediates were confirmed using FT-IR, 1H NMR, and 13C NMR spectroscopy. The formation of hyperbranched polyurethanes and their end-group modifications were confirmed using 1H NMR spectra. The absolute molecular weights of the polymers were determined using SEC-MALLS technique and the values were found to be varied from 6.8 × 103 g/mole to 1.1 × 105 g/mole. The diverse functions of all the synthesised polymers were studied. Dye-sensitized solar cells (DSSC) fabricated with a polymer derived from Monomer-2 (InHBPU-5) yielded an overall energy conversion efficiency of η = 6.59% upon 1 sun illumination with visible light. Also, this polymer showed activity almost equal to tetracycline (control) toward both gram-positive and gram-negative bacterial strains. In addition, this polymer and its monomer, both exhibited good capacity for scavenging DPPH free radical.
UR - https://www.scopus.com/pages/publications/85029647064
U2 - 10.1016/j.eurpolymj.2017.08.021
DO - 10.1016/j.eurpolymj.2017.08.021
M3 - Article
AN - SCOPUS:85029647064
SN - 0014-3057
VL - 95
SP - 216
EP - 231
JO - European Polymer Journal
JF - European Polymer Journal
ER -