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12
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37049106572
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J. C. Dyason P. C. Healy L. M. Engelhardt C. Pakawatchai V. A. Patrick C. L. Raston A. H. White J. Chem. Soc., Dalton Trans. 1985 831 838
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(1985)
J. Chem. Soc., Dalton Trans.
, pp. 831-838
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Dyason, J.C.1
Healy, P.C.2
Engelhardt, L.M.3
Pakawatchai, C.4
Patrick, V.A.5
Raston, C.L.6
White, A.H.7
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13
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77955777722
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note
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4,: C, 47.75; H, 3.34%.)
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14
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77955833555
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2) was 0.056 (all data)
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2) was 0.056 (all data).
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15
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77955834572
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2) was 0.0179 (all data)
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2) was 0.0179 (all data)
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16
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77955835803
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Luminescence spectra from the single crystals were measured by a Hamamatsu PMA-11 spectrometer (190-900 nm) through a microscope. The crystalline samples were placed in a Linkham THMS 600 temperature controlled (-195 °C to 20 °C) microscope stage. A Panasonic UJ-20 UV-LED system was used as the excitation light source at 365 nm
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Luminescence spectra from the single crystals were measured by a Hamamatsu PMA-11 spectrometer (190-900 nm) through a microscope. The crystalline samples were placed in a Linkham THMS 600 temperature controlled (-195 °C to 20 °C) microscope stage. A Panasonic UJ-20 UV-LED system was used as the excitation light source at 365 nm.
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17
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77955777721
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Single crystal X-ray diffraction measurements for 1a and 1b above 100 K were performed on a Rigaku Rapid image plate diffractometer using Mo-Kα (λ = 0.7107 Å) radiation. A sample crystal was mounted on a glass capillary kept under a cold nitrogen gas stream from a cryostat. A large cylindrical image plate diffractometer at the SPring-8 BL02B1 beamline was used with a helium gas-flow type cryostat in the lower temperature region. The X-ray radiation from a bending magnet was monochromatized by a Si(111) double crystal (λ = 0.5886 Å). The summaries of the crystallographic data for 1a and 1b at various temperatures are listed in Tables S1 and S2, respectively. Selected bond-lengths and angles at room temperature and 20 K are listed in Table S3
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Single crystal X-ray diffraction measurements for 1a and 1b above 100 K were performed on a Rigaku Rapid image plate diffractometer using Mo-Kα (λ = 0.7107 Å) radiation. A sample crystal was mounted on a glass capillary kept under a cold nitrogen gas stream from a cryostat. A large cylindrical image plate diffractometer at the SPring-8 BL02B1 beamline was used with a helium gas-flow type cryostat in the lower temperature region. The X-ray radiation from a bending magnet was monochromatized by a Si(111) double crystal (λ = 0.5886 Å). The summaries of the crystallographic data for 1a and 1b at various temperatures are listed in Tables S1 and S2, respectively. Selected bond-lengths and angles at room temperature and 20 K are listed in Table S3.
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19
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77955821136
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Both crystalline forms melt around 265 °C with decomposition. There is no significant discrepancy in those melting points and enthalpy changes. When the samples are heated in a sealed aluminium can, they are kept melting up to 300 °C without decomposition. Solid samples from both crystalline forms, which are once heated above melting point and then cooled down, give the same green-yellow photoemission. This indicates that the molecule in 1a takes a more thermodynamically stable conformation than that in 1b
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Both crystalline forms melt around 265 °C with decomposition. There is no significant discrepancy in those melting points and enthalpy changes. When the samples are heated in a sealed aluminium can, they are kept melting up to 300 °C without decomposition. Solid samples from both crystalline forms, which are once heated above melting point and then cooled down, give the same green-yellow photoemission. This indicates that the molecule in 1a takes a more thermodynamically stable conformation than that in 1b.
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