Mechanoresponsive turn-on phosphorescence by a desymmetrization approach.
Tani, Yosuke; Komura, Mao; Ogawa, Takuji; Chemical communications (Cambridge, England) 56 (2020) 6810–6813; doi:10.1039/d0cc01949f

data_7126546
_publ_section_title
;
 Mechanoresponsive turn-on phosphorescence by a desymmetrization approach.
;
_journal_issue                   50
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              6810
_journal_page_last               6813
_journal_paper_doi               10.1039/d0cc01949f
_journal_volume                  56
_journal_year                    2020
_chemical_formula_sum            'C28 H45 Br O2 S2 Si2'
_chemical_formula_weight         613.85
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2020-02-26 deposited with the CCDC.	2020-05-11 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.677(3)
_cell_angle_gamma                90
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_cell_length_b                   9.4516(14)
_cell_length_c                   27.594(4)
_cell_measurement_reflns_used    3825
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      27.4855
_cell_measurement_theta_min      3.122
_cell_volume                     3189.5(8)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalClear
_computing_molecular_graphics    'Yadokari-XG (Wakita, Nemoto et al., 2009)'
_computing_publication_material  'Yadokari-XG (Wakita, Nemoto et al., 2009)'
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_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku XtaLAB P200'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0207
_diffrn_reflns_av_unetI/netI     0.0360
_diffrn_reflns_Laue_measured_fraction_full 0.998
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_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            14623
_diffrn_reflns_point_group_measured_fraction_full 0.937
_diffrn_reflns_point_group_measured_fraction_max 0.917
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.478
_diffrn_reflns_theta_min         3.075
_exptl_absorpt_coefficient_mu    1.517
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9152
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.278
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1296
_exptl_crystal_size_max          0.270
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.630
_refine_diff_density_min         -0.363
_refine_diff_density_rms         0.052
_refine_ls_abs_structure_details
;
 Flack x determined using 2317 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.122(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         6673
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0446
_refine_ls_R_factor_gt           0.0356
_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^)+(0.0490P)^2^+0.4142P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0831
_refine_ls_wR_factor_ref         0.0861
_reflns_Friedel_coverage         0.836
_reflns_Friedel_fraction_full    0.876
_reflns_Friedel_fraction_max     0.836
_reflns_number_gt                5761
_reflns_number_total             6673
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0cc01949f2.cif
_cod_data_source_block           mk251f
_cod_depositor_comments
'Adding full bibliography for 7126544--7126553.cif.'
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               7126546
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.685
_shelx_estimated_absorpt_t_max   0.863
_shelx_res_checksum              82489
_shelx_hkl_checksum              14863