Reversible luminescence color switching in the crystal polymorphs of 2,7-bis(2'-methyl-[1,1'-biphenyl]-4-yl)-fluorenone by thermal and mechanical stimuli
Xianchao Du; Fan Xu; Mao-Sen Yuan; Pengchong Xue; Lei Zhao; Dong-En Wang; Wenji Wang; Qin Tu; Shu-Wei Chen; Jinyi Wang; Journal of Materials Chemistry C 4 (2016) 8724–8730; doi:10.1039/C6TC02804G

data_7235024
_publ_section_title
;
 Reversible luminescence color switching in the crystal polymorphs of
 2,7-bis(2'-methyl-[1,1'-biphenyl]-4-yl)-fluorenone by thermal and
 mechanical stimuli
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              8724
_journal_page_last               8730
_journal_paper_doi               10.1039/C6TC02804G
_journal_volume                  4
_journal_year                    2016
_chemical_formula_sum            'C39 H28 O'
_chemical_formula_weight         512.61
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 95.0780(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.6772(6)
_cell_length_b                   15.0035(13)
_cell_length_c                   47.276(3)
_cell_measurement_reflns_used    2467
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.213
_cell_measurement_theta_min      2.595
_cell_volume                     5424.1(7)
_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      298(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.1764
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       56
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            9440
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.55
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.9949
_exptl_absorpt_correction_T_min  0.9847
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.255
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2160
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.497
_refine_diff_density_min         -0.502
_refine_diff_density_rms         0.124
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     847
_refine_ls_number_reflns         9440
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.2603
_refine_ls_R_factor_gt           0.1421
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1323P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2996
_refine_ls_wR_factor_ref         0.3524
_reflns_number_gt                3467
_reflns_number_total             9440
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            J-Mater-Chem-C-2016-4-8724.cif
_cod_data_source_block           150623a
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the built-in table derived from the
CIF Core dictionary named 'cif_core.dic' version 2.4.5 last updated
on 2014-11-21.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7235024