title: 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.
authors.affiliation: Institute for Laser Science, University of Electronic Communication, 1-5-1, Chofugaoka 182-8585, Chofu shi, Tokyo, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Kumar
authors.forename: Gin
authors.initials: G
authors.lastname: Jose
authors.forename: Vinoy
authors.initials: V
authors.lastname: Thomas
authors.forename: N V
authors.initials: NV
authors.lastname: Unnikrishnan
authors.forename: V P N
authors.initials: VP
authors.lastname: Nampoori
mesh_terms: D001881:Borates / Q000737:chemistry; D003035:Cobalt / Q000032:analysis; D003300:Copper / Q000032:analysis; D005898:Glass / Q000737:chemistry*; D007211:Indoles / Q000032:analysis*; D054833:Isoindoles; D008982:Molybdenum / Q000032:analysis; D009532:Nickel / Q000032:analysis; D017785:Photons; D013055:Spectrophotometry, Infrared / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D014466:Ultraviolet Rays; D015032:Zinc / Q000032:analysis
chemical_list: D001881:Borates; D007211:Indoles; D054833:Isoindoles; D003035:Cobalt; D003300:Copper; D009532:Nickel; D008982:Molybdenum; D015032:Zinc; C013647:phthalocyanine