Spectroscopic studies of solid phthalocyanines and their charge transfer salts

Yakushi, Kyuya; Simonyan, Mkhital; Ding, Yuqin

doi:10.1002/1099-1409(200101)5:1<13::aid-jpp299>3.3.co;2-f

Cited by 2 publications

(13 citation statements)

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“…3. The spectrum shows the characteristic peaks of the Pcs in the IR region [20] confirming that the Pcs are intact inside the glass host. The observed transitions, their spectral assignments and the calculated optical constants except the molar extinction coefficient o (which was directly obtained from the absorption data) are summarized in Tables 1Á/8.…”

Section: Resultsmentioning

confidence: 70%

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

Kumar

Jose

Thomas

et al. 2003

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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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.

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Section: Resultsmentioning

confidence: 70%

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

Kumar

Jose

Thomas

et al. 2003

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

View full text Add to dashboard Cite

show abstract

“…6,19,23 Later this conclusion was verified by resistivity and thermoelectric power measurements under applied pressure. 6,25,26 They determined the temperature-pressure phase diagram (Figure 10) of [Ni(Pc)] 2 (AsF 6 ) from the resistivity measurements under applied pressure. On the basis of the X-ray study under applied pressure, they proposed a model that shortening of the Ni-Ni distance pushed up the 3d z 2 orbital energy under applied pressure.…”

Section: [Ni(pc)] 2 (Asf 6 ) and [Ni(pc)] 2 (Sbf 6 )mentioning

confidence: 81%

“…A similar conclusion is obtained from the disappearance of the electronic transition around 18 500 cm -1 . 6 They also deduced that a metal-insulator transition occurred above 5 kbar from the decrease of the plasmon absorption band and concluded that the AsF 6 salts fell into an insulating state as a result of hole transfer from the Pc ring to the Ni atom. 6,19,23 Later this conclusion was verified by resistivity and thermoelectric power measurements under applied pressure.…”

Section: [Ni(pc)] 2 (Asf 6 ) and [Ni(pc)] 2 (Sbf 6 )mentioning

confidence: 99%

“…6 They also deduced that a metal-insulator transition occurred above 5 kbar from the decrease of the plasmon absorption band and concluded that the AsF 6 salts fell into an insulating state as a result of hole transfer from the Pc ring to the Ni atom. 6,19,23 Later this conclusion was verified by resistivity and thermoelectric power measurements under applied pressure. 6,25,26 They determined the temperature-pressure phase diagram (Figure 10) of [Ni(Pc)] 2 (AsF 6 ) from the resistivity measurements under applied pressure.…”

Section: [Ni(pc)] 2 (Asf 6 ) and [Ni(pc)] 2 (Sbf 6 )mentioning

confidence: 99%

“…On the basis of the X-ray study under applied pressure, they proposed a model that shortening of the Ni-Ni distance pushed up the 3d z 2 orbital energy under applied pressure. 6,25,26…”

Section: [Ni(pc)] 2 (Asf 6 ) and [Ni(pc)] 2 (Sbf 6 )mentioning

confidence: 99%

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