Strong two-photon absorption and ultrafast dynamics of meso-functionalized “push–pull” trans-A₂BC porphyrins

Abstract

A new series of “Push-Pull” meso-substituted trans-A2BC porphyrins, where A = mesityl, B = phenothiazine (push) and C = o/p-nitrophenyl moiety (pull) and M = 2H, Ni(II), Cu(II), and Zn(II)...

Optical, Electrochemical, Third-Order Nonlinear Optical Investigations of 3,4,5-Trimethoxy Phenyl Substituted Non-Aqueous Phthalocyanines

“…To put the NLO performance in perspective of the studied molecules, we compared the NLO coefficients of title compounds with some of the newly reported phthalocyanine molecules under similar experimental conditions. A similar comparison exercise has been reported by us in our recent work on porphyrins ( Kumar et al, 2021b ) and phthalocyanines ( Bhattacharya et al, 2021 ). There have been several NLO reports on novel phthalocyanines but with nanosecond pulses (see, e.g., Schmidt and Calvete, 2021 ), and we have not considered those in this comparison study.…”

“…Phthalocyanines (Pcs) are large aromatic pigment molecules composed of four isoindole units linked by nitrogen atoms ( Giribabu et al, 2008 ). Unlike porphyrins, phthalocyanines are human-made compounds which have a wide range of advantages in diversified areas such as sensor technology, catalysts, electrochromism, liquid crystals, photodynamic therapy, and energy storage devices to name a few ( Gregory, 2000 ; Zagal et al, 2010 ; Tuncel et al, 2012 ; Kuzmina et al, 2019 ; Buyukeksi et al, 2020 ; Kumar et al, 2021b ; Halaskova et al, 2021 ). Because of their electronic delocalization, innumerable properties arise which make them of great potential in various fields of science and technology.…”

Nonlinear Optical Properties of Porphyrin, Fullerene and Ferrocene Hybrid Materials

“…The UV-Vis data allowed us to highlight the effect that the introduction of Fc and/or C60 may have had on the electronic properties of P (and of its Zn II complex) [ 73 ].…”

“…The UV-Vis data allowed us to highlight the effect that the introduction of Fc and/or C60 may have had on the electronic properties of P (and of its Zn II complex) [73]. Starting from 5, 10, 15, 20-tetraphenylporphyrin 1 (Scheme 1), the introduction in βpyrrolic position of an electron-donating Fc moiety connected to the core by a triple bond (3a) produced a sizable redshift of the B and the Q bands (9 and 11-18 nm, respectively), suggesting an increased molecular conjugation.…”

Synthesis and the spectral, electrochemical, and nonlinear optical properties of β-dicyanovinyl-appended ‘push–pull’ porphyrins

“…This journal is © The Royal Society of Chemistry 2022 47,59,60 The dipole moment of H 2 TPP(MN) (TPA) 2 is 9.7-fold higher than that of H 2 TPP (µ = 0.052 D) because of polarisation. In Fig.…”