Solvatochromism, acidochromism and aggregation-induced emission of propeller-shaped spiroborates.
Li, Kang; Cui, Jichun; Yang, Zeren; Huo, Yanmin; Duan, Wenzeng; Gong, Shuwen; Liu, Zhipeng; Dalton transactions (Cambridge, England : 2003) 47 (2018) 15002–15008; doi:10.1039/c8dt03374a

data_7047642
_publ_section_title
;
 Solvatochromism, acidochromism and aggregation-induced emission of
 propeller-shaped spiroborates.
;
_journal_issue                   42
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              15002
_journal_page_last               15008
_journal_paper_doi               10.1039/c8dt03374a
_journal_volume                  47
_journal_year                    2018
_chemical_formula_sum            'C26 H20 B N O4'
_chemical_formula_weight         421.24
_space_group_IT_number           33
_space_group_name_Hall           'P -2ac -2n'
_space_group_name_H-M_alt        'P n 21 a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P -2ac -2n'
_symmetry_space_group_name_H-M   'P n 21 a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2018-01-05 deposited with the CCDC.
2018-09-24 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.1106(9)
_cell_length_b                   9.7939(6)
_cell_length_c                   15.4646(8)
_cell_measurement_reflns_used    3599
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      65.98
_cell_measurement_theta_min      4.24
_cell_volume                     2137.2(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'multiwire proportional'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0566
_diffrn_reflns_av_sigmaI/netI    0.0527
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            12385
_diffrn_reflns_theta_full        65.98
_diffrn_reflns_theta_max         65.98
_diffrn_reflns_theta_min         4.24
_exptl_absorpt_coefficient_mu    0.708
_exptl_absorpt_correction_T_max  0.8832
_exptl_absorpt_correction_T_min  0.8429
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.309
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.131
_refine_diff_density_min         -0.177
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.951
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     290
_refine_ls_number_reflns         3599
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.951
_refine_ls_R_factor_all          0.0644
_refine_ls_R_factor_gt           0.0440
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0469P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0923
_refine_ls_wR_factor_ref         0.1085
_reflns_number_gt                2624
_reflns_number_total             3599
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8dt03374a2.cif
_cod_data_source_block           5
_cod_depositor_comments
'Adding full bibliography for 7047640--7047645.cif.'
_cod_original_sg_symbol_H-M      pn21a
_cod_database_code               7047642