The background of this work is based on preparation and characterization of new optically active charge transfer
complexes (CTC) to harvest weak infra-red photons emitted from sun light to avoid thermal heat and converting
such waste heat into useful work. The innovation in study is that it is first time to prepare such new that absorb in
IR and have good thermal conductivity. The obtained results have good impact in both material science and
academic research. Electron-donors thiophene Schiff bases: 2-((2-OH-benzylidene) amino) − 4, 5, 6, 7-tetrahydrobenzo[b] thiophene-3-carbonitrile (D1) and 2-((Furan-2ylmethylene) amino) 4, 5, 6, 7 tetrahydrobenzo[b]
thiophene-3-carbonitrile (D2) are prepared. For the first time as novelty, these electron donors Schiff bases are
intercalated to electron-acceptor picric acid (A1) derivative (A2) forming new charge transfer complexes (CTC).
Low charge transfer energy in the range 2.899 eV-3.316 eV reflects good non linear optical activity. Molar
extinction coefficients (∊, M− 1
cm− 1 × 103) CTC [(D1) (A2)2], [(D2) (A2)], [(D2) (A2)2] are 125.6, 129.9, and
133.41 respectively reflect excellent optical activities. Deposition CTC as thin film (TF) aluminium foil decrease
energy gap of [D1A1] and enhanced absorption of thermal energy of weak IR photons. High thermal conductivity
of CTC ranging from 1.1 W.min− 1
.K− 1 to 1.6 W.min− 1
.K− 1 for different particle size. This behavior enabled
attenuation of electromagnetic radiation and rapid heat dissipation due to dielectric properties and polarity. On
heating, AC electrical conductivity of CTC and dielectric properties confirmed attenuation of thermal infra-red
radiation results from golbal warming results from climate change in hot summer season. |
