Short Excited-State Lifetimes Enable Photo-Oxidatively Stable Rubrene Derivatives.
Ly, Jack; Martin, Kara; Thomas, Simil; Yamashita, Masataka; Yu, Beihang; Pointer, Craig A.; Yamada, Hiroko; Carter, Kenneth R.; Parkin, Sean; Zhang, Lei; Bredas, Jean-Luc; Young, Elizabeth R.; Briseno, Alejandro L.; The journal of physical chemistry. A 123 (2019) 7558–; doi:10.1021/acs.jpca.9b04203

data_1552738
_publ_section_title
;
 Short Excited-State Lifetimes Enable Photo-Oxidatively Stable Rubrene
 Derivatives.
;
_journal_issue                   35
_journal_name_full               'The journal of physical chemistry. A'
_journal_page_first              7558
_journal_paper_doi               10.1021/acs.jpca.9b04203
_journal_volume                  123
_journal_year                    2019
_chemical_formula_moiety         'C40 H36 Si2'
_chemical_formula_sum            'C40 H36 Si2'
_chemical_formula_weight         572.87
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'SHELXL-2014/7 and CIFFIX'
_cell_angle_alpha                90
_cell_angle_beta                 93.0100(15)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.4701(4)
_cell_length_b                   10.2654(3)
_cell_length_c                   19.1679(5)
_cell_measurement_reflns_used    7835
_cell_measurement_temperature    90.0(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     3236.29(15)
_computing_cell_refinement       '<i>SCALEPACK</i> (Otwinowski & Minor, 2006)'
_computing_data_collection       '<i>COLLECT</i> (Nonius, 1998)'
_computing_data_reduction        '<i>DENZO-SMN</i> (Otwinowski & Minor, 2006)'
_computing_molecular_graphics    '<i>XP in SHELXTL</i> (Sheldrick, 2008)'
_computing_publication_material
'<i>SHELX</i> (Sheldrick, 2008) and <i>CIFFIX</i> (Parkin, 2013)'
_computing_structure_refinement  '<i>SHELXL-2014/7</i> (Sheldrick, 2015b)'
_computing_structure_solution    '<i>SHELXT</i> (Sheldrick, 2015a)'
_diffrn_ambient_temperature      90.0(2)
_diffrn_detector_area_resol_mean 9.1
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius KappaCCD diffractometer'
_diffrn_measurement_method       '\f and \w scans at fixed \c = 55\%'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0453
_diffrn_reflns_av_unetI/netI     0.0343
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            56728
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.536
_diffrn_reflns_theta_min         2.128
_diffrn_source                   'fine-focus sealed-tube'
_exptl_absorpt_coefficient_mu    0.136
_exptl_absorpt_correction_T_max  0.956
_exptl_absorpt_correction_T_min  0.762
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '<i>SADABS</i> (Krause et al., 2015)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.176
_exptl_crystal_description       'irregular block'
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.320
_exptl_crystal_size_mid          0.240
_exptl_crystal_size_min          0.160
_refine_diff_density_max         0.228
_refine_diff_density_min         -0.328
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     385
_refine_ls_number_reflns         7452
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.0599
_refine_ls_R_factor_gt           0.0406
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0614P)^2^+0.4150P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1037
_refine_ls_wR_factor_ref         0.1162
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5485
_reflns_number_total             7452
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jp9b04203_si_004.cif
_cod_data_source_block           k15059
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1552738
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.958
_shelx_estimated_absorpt_t_max   0.979
_exptl_absorpt_special_details
; 
In addition to absorption, multi-scan techniques also correct other slowly 
varying changes in scale factor over reciprocal space, such as those caused 
by x-ray beam inhomogeneity, goniometer imperfection, crystal decomposition, 
crystal longer than the x-ray beam cross section, absorption by the crystal 
mount etc.  These account, by and large, for much of the difference between 
estimated values of Tmin and Tmax and the _exptl_absorpt_correction_ values. 
;
_shelx_res_checksum              73853
_shelx_hkl_checksum              64791