NIR to UV absorption spectra and the optical constants of phthalocyanines in glassy medium

Abstract

Optical absorption studies of phthalocyanines (Pc-s) in borate glass matrix have been reported for the first time. Measurements have been done corresponding to photon energies between 1.1 and 6.2 eV for free base, manganese, iron, nickel, molybdenum, cobalt and copper phthalocyanines. Several new discrete transitions are observed in the UV-vis region of the spectra in addition to a strong continuum component of absorption in the IR region. Values of some of the important optical constants viz. absorption coefficient (alpha), molar extinction coefficient (epsilon), absorption cross-section (sigma(a)), band width (delta lambda), electric dipole strength (q2) and oscillator strength (f) for the relevant electronic transitions are also presented. All the data reported for Pc-s in the new matrix have been compared with those corresponding to solution, vapor and thin film media.

Morphological and Optical Properties of Dimetallo-Phthalocyanine-Complex Thin Films

“…In general, they can be classified as p-type semiconductors characterized by low mobility and low carrier concentration [2][3][4][5][6]. Phthalocyanine represents a large family of heterocyclic conjugated molecules, consisting of four benzoisoindole units, with potential applications in the fabrication of solar cells, chemical sensors, electronic displays and optical data storage systems [3][4][5][6][7][8][9][10][11][12]. Phthalocyanine compounds were first observed as highly colored by-products of O-cyanobenzamide preparation from phthalamide and acetic anhydride [13].…”

“…Optical properties, such as absorption and emission, are frequently anisotropic, a characteristic that has been used for organic light emitting diodes as well as for organic solar cells [8][9][10][11][12]. They are also widely used as laser dyes capable of excellent optical amplification in the red region because of their good light absorption in the UV-Vis region [20][21][22][23][24].…”

Spectroscopic characterization of zirconium(IV) and hafniumf(IV) gallate phthalocyanines in monolithic silica gels obtained by sol–gel method

“…Sol-gel materials doped by metalloporphyrins and metallophthalocyanines could be used as model system for solar-to-electric energy converters, optical data carrier, chemical sensors and laser devices [7][8][9]. Sol-gels (either monoliths or thin films) are very useful to encapsulate a range of guests such as inorganic clusters [10][11][12], lanthanide complexes [13,14], or laser 0925 dyes [15][16][17].…”

Estudio Commputacional De Las Propiedades Ópticas No Lineales De Segundo Orden en Ftalocianinas De Cobre Substituidas Con Ligandos Donador-Aceptor

“…Time dependent Density Functional Theory studies were carried on using a set of functionals to evaluate the optical band gap which is shown in figure 2, according to experimental data in gas phase 14 , HSE is the more approximate to the experimental value of 656.2 nm (Q Band peak) with 650.81 nm, it has been also shown that this screened hybrid functional has been applied to organic and inorganic systems making a well-suitable functional to study electronic excitations in the phthalocyanine derivatives, PBE functional which is the second most accurate with a peak in 624.88 nm will be used to study the NLO also. Surprisingly CAM-B3LYP which is a long range functional does not show accurate data and even less B3LYP which is a not suitable functional for metal containing systems because they were not part of the data set against which B3LYP was parametrize.…”