Pyranone‒Arylbenzene Molecules Controlled by the Competition of Local Excited State and Twisted Intramolecular Charge-Transfer State: Dual-State Emission, Polymorphism, and Mechanofluorochromism
Xiao, Fuming; Liu, Xiaoqing; Lin, Kangkang; Zhou, Yunbing; Gao, Wenxia; Lei, Yunxiang; Liu, Miaochang; Huang, Xiaobo; Wu, Huayue; The Journal of Physical Chemistry C  (2021) –; doi:10.1021/acs.jpcc.1c04340

data_1564244
_publ_section_title
;
 Pyranone--Arylbenzene Molecules Controlled by the Competition of Local
 Excited State and Twisted Intramolecular Charge-Transfer State:
 Dual-State Emission, Polymorphism, and Mechanofluorochromism
;
_journal_name_full               'The Journal of Physical Chemistry C'
_journal_paper_doi               10.1021/acs.jpcc.1c04340
_journal_year                    2021
_chemical_formula_sum            'C23.5 H16 O'
_chemical_formula_weight         314.36
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 103.3920(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   24.1244(11)
_cell_length_b                   11.3542(5)
_cell_length_c                   14.5640(6)
_cell_measurement_reflns_used    5225
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      52.369
_cell_measurement_theta_min      4.673
_cell_volume                     3880.8(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.966
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0470
_diffrn_reflns_av_unetI/netI     0.0354
_diffrn_reflns_Laue_measured_fraction_full 0.966
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            21226
_diffrn_reflns_point_group_measured_fraction_full 0.966
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         24.996
_diffrn_reflns_theta_min         1.735
_exptl_absorpt_coefficient_mu    0.064
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6542
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.076
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1320
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.110
_platon_squeeze_details
;
;
_refine_diff_density_max         0.180
_refine_diff_density_min         -0.231
_refine_diff_density_rms         0.056
_refine_ls_extinction_coef       0.010(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     225
_refine_ls_number_reflns         3389
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.1053
_refine_ls_R_factor_gt           0.0754
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1558P)^2^+0.3958P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2263
_refine_ls_wR_factor_ref         0.2537
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2169
_reflns_number_total             3389
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jp1c04340_si_008.cif
_cod_data_source_block           mo_dd19402_0m
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_original_formula_sum        'C23.50 H16 O'
_cod_database_code               1564244
_shelx_estimated_absorpt_t_min   0.988
_shelx_estimated_absorpt_t_max   0.993
_shelxl_version_number           2013-4
_shelx_res_checksum              84325
_shelx_hkl_checksum              11823