A mechanistic investigation of mechanochromic luminescent organoboron materials
Sun, Xingxing; Zhang, Xuepeng; Li, Xinyang; Liu, Shiyong; Zhang, Guoqing; Journal of Materials Chemistry 22 (2012) 17332–; doi:10.1039/c2jm32809g

data_7238536
_publ_section_title
;
 A mechanistic investigation of mechanochromic luminescent organoboron
 materials
;
_journal_issue                   33
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              17332
_journal_paper_doi               10.1039/c2jm32809g
_journal_volume                  22
_journal_year                    2012
_chemical_formula_sum            'C21 H19 B F2 O4'
_chemical_formula_weight         384.17
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'C 1 2/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                 98.870(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.2572(17)
_cell_length_b                   7.2012(3)
_cell_length_c                   10.3231(5)
_cell_measurement_reflns_used    1869
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      29.2024
_cell_measurement_theta_min      2.9297
_cell_volume                     1928.58(18)
_computing_cell_refinement       'CrysAlisPro (Oxford Diffraction Ltd.)'
_computing_data_collection       'CrysAlisPro (Oxford Diffraction Ltd.)'
_computing_data_reduction        'CrysAlisPro (Oxford Diffraction Ltd.)'
_computing_molecular_graphics    'Ortep-3 (L. J. Farrugia, 2001)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      291(2)
_diffrn_detector_area_resol_mean 15.9149
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Gemini S Ultra, Oxford Diffraction'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0356
_diffrn_reflns_av_sigmaI/netI    0.0284
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            8854
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.94
_exptl_absorpt_coefficient_mu    0.102
_exptl_absorpt_correction_T_max  0.9759
_exptl_absorpt_correction_T_min  0.9641
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.19 (release 27-10-2011 CrysAlis171 .NET)
(compiled Oct 27 2011,15:02:11)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_density_diffrn    1.323
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.178
_refine_diff_density_min         -0.173
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         1966
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0942
_refine_ls_R_factor_gt           0.0541
_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^)+(0.0657P)^2^+0.5425P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1318
_refine_ls_wR_factor_ref         0.1550
_reflns_number_gt                1186
_reflns_number_total             1966
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2jm32809g.txt
_cod_data_source_block           sxx-3
_cod_original_sg_symbol_H-M      'C2 /c'
_cod_database_code               7238536