The influence of pH over topography and spectroscopic properties of silica hybrid materials embedding meso-tetratolylporphyrin

Memory and ferroelectric photovoltaic effects arising from quasi-reversible oxidation and reduction in porphyrin entrapped aminopropyl-silicate films

“…1(c) [18,19]. The APTMS network also facilitated the J-aggregation of THPP and TPyP which is confirmed from the red shift in the characteristics absorption in UV-Vis spectra [18,19]. The absorption maximum which is around 415 nm for the molecules (THPP and TPyP in solution), is observed at 432 nm for the THPP and TPyP embedded APTMS film (THPP_TPyP_APTMS) (for UV-Vis spectra of THPP and TPyP, Supplementary information Fig.…”

“…However, except a few sharp bands such as 1588 cm À1 and 1474 cm À1 , the distinct characteristics bands of THPP and TPyP are not visible in the FTIR spectra, because the characteristics bands of THPP and TPyP overlap with that of APTMS as shown in the Fig. 1(c) [18,19]. The APTMS network also facilitated the J-aggregation of THPP and TPyP which is confirmed from the red shift in the characteristics absorption in UV-Vis spectra [18,19].…”

“…Therefore, we chose APTMS which polymerize to aminosilicate polymer films in ambient conditions [17]. In general, acid-base is used as catalysis for the polymerization of APTMS [18,19]. In present case, we chose light absorbing and environmentally stable acidic and basic molecules, THPP and TPyP.…”

“…In present case, we chose light absorbing and environmentally stable acidic and basic molecules, THPP and TPyP. THPP can donate proton and TPyP accepts proton so that these protons donating/accepting capacity would facilitate the interaction of these molecules with APTMS network in addition to their catalytic behavior [18,19]. The molecular structures of THPP and TPyP are shown in Fig.…”

Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

“…Chloro [5,10,15,20-tetrakis-(4-methylphenyl)porphyrinato manganese(III)] (MnTTPCl) was prepared from the corresponding porphyrin base, which was previously reported and fully characterized [33], by using classical metallation of the porphyrin-free ligand (in ethanol at porphyrin : manganese ratios of 1 : 20-1 : 30) [34]. e FT-IR, Raman, UV-Vis, and fluorescence spectroscopic data and AFM, SEM, TEM, and electrochemical characterizations of MnTTPCl were reported in already published papers [35] together with some specific characterizations for sensing applications of diclofenac, H 2 O 2 , and NO 2 gas [32,36]; β-carotene was purchased from Merck, and the gold colloid was synthesized according to recent literature data [37] and already characterized by UV-Vis, AFM, TEM, and STEM [31,38].…”