Sterically induced polymorphism: ON–OFF control of excited-state intramolecular proton transfer (ESIPT) luminescence of 1-methyl-2-(2′-hydroxyphenyl)benzimidazole
Shida, Toshihide; Mutai, Toshiki; Araki, Koji; CrystEngComm 15 (2013) 10179–; doi:10.1039/c3ce41742e

data_7214601
_publ_section_title
;
 Sterically induced polymorphism: ON--OFF control of excited-state
 intramolecular proton transfer (ESIPT) luminescence of
 1-methyl-2-(2&#x2032;-hydroxyphenyl)benzimidazole
;
_journal_issue                   47
_journal_name_full               CrystEngComm
_journal_page_first              10179
_journal_paper_doi               10.1039/c3ce41742e
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C14 H12 N2 O'
_chemical_formula_sum            'C14 H12 N2 O'
_chemical_formula_weight         224.26
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                73.45(4)
_cell_angle_beta                 85.81(4)
_cell_angle_gamma                74.91(4)
_cell_formula_units_Z            4
_cell_length_a                   7.117(7)
_cell_length_b                   10.007(8)
_cell_length_c                   16.788(16)
_cell_measurement_reflns_used    2271
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      25.32
_cell_measurement_theta_min      2.82
_cell_volume                     1106.6(18)
_computing_cell_refinement       CrystalClear
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        CrystalClear
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'Il Milione (Burla, et al., 2007)'
_diffrn_ambient_temperature      93(2)
_diffrn_detector_area_resol_mean 7.111
_diffrn_measured_fraction_theta_full 0.950
_diffrn_measured_fraction_theta_max 0.950
_diffrn_measurement_device_type  'Rigaku Saturn724'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.1060
_diffrn_reflns_av_sigmaI/netI    0.1279
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6981
_diffrn_reflns_theta_full        25.33
_diffrn_reflns_theta_max         25.33
_diffrn_reflns_theta_min         2.82
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9965
_exptl_absorpt_correction_T_min  0.9661
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
'Rigaku (1999). NUMABS. Rigaku Corporation, Tokyo, Japan.'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.627
_refine_diff_density_min         -0.343
_refine_diff_density_rms         0.091
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.080
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         3853
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.080
_refine_ls_R_factor_all          0.1380
_refine_ls_R_factor_gt           0.1009
_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^)+(0.1230P)^2^+2.0264P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2730
_refine_ls_wR_factor_ref         0.2949
_reflns_number_gt                2445
_reflns_number_total             3853
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ce41742e.txt
_cod_data_source_block           MeHBIL
_cod_original_cell_volume        1106.5(17)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7214601