V-shaped fluorophores with a 1-methyl-4,5-bis(arylethynyl)imidazole skeleton displaying solid-state fluorescence, acid responsiveness, and remarkable fluorescence solvatochromism
Miura, Youhei; Kobayashi, Kotaro; Yoshioka, Naoki; New Journal of Chemistry 45 (2021) 898–905; doi:10.1039/D0NJ05323F

data_7060201
_publ_section_title
;
 V-shaped fluorophores with a 1-methyl-4,5-bis(arylethynyl)imidazole
 skeleton displaying solid-state fluorescence, acid responsiveness, and
 remarkable fluorescence solvatochromism
;
_journal_issue                   2
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              898
_journal_page_last               905
_journal_paper_doi               10.1039/D0NJ05323F
_journal_volume                  45
_journal_year                    2021
_chemical_formula_moiety         'C20 H14 N2'
_chemical_formula_sum            'C20 H14 N2'
_chemical_formula_weight         282.33
_chemical_melting_point          383.5(5)
_chemical_name_common            NMePhPh
_chemical_name_systematic        4,5-bisphenylethynyl-1methylimidazole
_space_group_crystal_system      triclinic
_space_group_IT_number           1
_space_group_name_Hall           'P 1'
_space_group_name_H-M_alt        'P 1'
_atom_sites_solution_hydrogens   geom
_audit_update_record
;
2019-08-29 deposited with the CCDC.	2020-12-03 downloaded from the CCDC.
;
_cell_angle_alpha                87.690(4)
_cell_angle_beta                 81.189(4)
_cell_angle_gamma                80.098(4)
_cell_formula_units_Z            4
_cell_length_a                   9.6262(10)
_cell_length_b                   12.6518(13)
_cell_length_c                   13.3053(14)
_cell_measurement_reflns_used    636
_cell_measurement_temperature    300.(2)
_cell_measurement_theta_max      21.9521
_cell_measurement_theta_min      2.2877
_cell_volume                     1577.3(3)
_computing_cell_refinement       'APEX3 v2016.1-0 (Bruker AXS)'
_computing_data_reduction        'SAINT V8.37A (Bruker AXS Inc., 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      300.(2)
_diffrn_detector_area_resol_mean 7.4074
_diffrn_measured_fraction_theta_full 0.952
_diffrn_measured_fraction_theta_max 0.952
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multilayered confocal mirror'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0627
_diffrn_reflns_av_unetI/netI     0.0978
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            14425
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         2.17
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.50
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/5 (Bruker AXS Inc.)'
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_density_diffrn    1.189
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             592
_exptl_crystal_preparation       Luminescent
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Dichloromethane/Hexane'
_exptl_crystal_size_max          1.260
_exptl_crystal_size_mid          0.474
_exptl_crystal_size_min          0.158
_refine_diff_density_max         0.162
_refine_diff_density_min         -0.137
_refine_ls_abs_structure_details
;

Flack x determined using 2176 quotients [(I+)-(I-)]/[(I+)+(I-)]
(Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -4.2(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.790
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     797
_refine_ls_number_reflns         8200
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      0.790
_refine_ls_R_factor_all          0.0717
_refine_ls_R_factor_gt           0.0591
_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^)+(0.1000P)^2^+0.7308P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1521
_refine_ls_wR_factor_ref         0.1750
_reflns_number_gt                6645
_reflns_number_total             8200
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0nj05323f2.cif
_cod_data_source_block           NMePhPh
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_chemical_melting_point' value '383-384' was changed to
'383.5(5)' -- the average value was taken and precision was
estimated.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 7060201--7060208.cif.
;
_cod_database_code               7060201
_shelx_res_checksum              85106