Twisted Tethered Tolanes: Unanticipated Long-Lived Phosphorescence at 77 K
Sebastian Menning; Maximilian Krämer; Benjamin A. Coombs; Frank Rominger; Andrew Beeby; Andreas Dreuw; Uwe H. F. Bunz; Journal of the American Chemical Society 135 (2013) 2160–2163; doi:10.1021/ja400416r

data_4119345
_publ_section_title
;
 Twisted Tethered Tolanes: Unanticipated Long-Lived Phosphorescence at 77
 K
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2160
_journal_page_last               2163
_journal_paper_doi               10.1021/ja400416r
_journal_volume                  135
_journal_year                    2013
_chemical_formula_sum            'C16 H14 O2'
_chemical_formula_weight         238.27
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 105.674(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.3999(5)
_cell_length_b                   4.6759(2)
_cell_length_c                   22.7022(9)
_cell_measurement_reflns_used    8887
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      27.76
_cell_measurement_theta_min      2.85
_cell_volume                     1267.34(9)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'ImuS microsource'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0427
_diffrn_reflns_av_sigmaI/netI    0.0235
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            34470
_diffrn_reflns_theta_full        28.50
_diffrn_reflns_theta_max         28.50
_diffrn_reflns_theta_min         0.93
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9943
_exptl_absorpt_correction_T_min  0.9879
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.249
_exptl_crystal_description       needle
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.231
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.104
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         3382
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.104
_refine_ls_R_factor_all          0.0545
_refine_ls_R_factor_gt           0.0457
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0576P)^2^+0.5072P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1261
_refine_ls_wR_factor_ref         0.1320
_reflns_number_gt                2908
_reflns_number_total             3382
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja400416r_si_001.cif
_cod_data_source_block           sme7
_cod_database_code               4119345