Mechanofluorochromic properties of fluorescent molecules based on a dicyanomethylene-4H-pyran and indole isomer containing different alkyl chains via an alkene module
Qian, Lebin; Zhou, Yibin; Liu, Miaochang; Huang, Xiaobo; Wu, Ge; Gao, Wenxia; Ding, Jinchang; Wu, Huayue; RSC Adv. 7 (2017) 42180–; doi:10.1039/C7RA06951K

data_7229026
_publ_section_title
;
 Mechanofluorochromic properties of fluorescent molecules based on a
 dicyanomethylene-4H-pyran and indole isomer containing different alkyl
 chains via an alkene module
;
_journal_issue                   67
_journal_name_full               'RSC Adv.'
_journal_page_first              42180
_journal_paper_doi               10.1039/C7RA06951K
_journal_volume                  7
_journal_year                    2017
_chemical_formula_sum            'C36 H34 N4 O'
_chemical_formula_weight         538.67
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2017-06-06 deposited with the CCDC.
2017-08-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 106.633(2)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   39.856(3)
_cell_length_b                   8.1733(4)
_cell_length_c                   19.7806(10)
_cell_measurement_reflns_used    1167
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      80.180
_cell_measurement_theta_min      4.627
_cell_volume                     6174.0(6)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.925
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.1099
_diffrn_reflns_av_unetI/netI     0.0792
_diffrn_reflns_Laue_measured_fraction_full 0.925
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       45
_diffrn_reflns_limit_h_min       -46
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            20863
_diffrn_reflns_point_group_measured_fraction_full 0.925
_diffrn_reflns_point_group_measured_fraction_max 0.981
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         64.991
_diffrn_reflns_theta_min         2.314
_exptl_absorpt_coefficient_mu    0.551
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.5442
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.159
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             2288
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.040
_refine_diff_density_max         0.208
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.913
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     442
_refine_ls_number_reflns         5158
_refine_ls_number_restraints     79
_refine_ls_restrained_S_all      0.929
_refine_ls_R_factor_all          0.1746
_refine_ls_R_factor_gt           0.0793
_refine_ls_shift/su_max          0.035
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1447P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2138
_refine_ls_wR_factor_ref         0.2966
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1822
_reflns_number_total             5158
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ra06951k2.cif
_cod_data_source_block           cu_dm16487_0m
_cod_database_code               7229026
_shelx_estimated_absorpt_t_min   0.898
_shelx_estimated_absorpt_t_max   0.978
_shelxl_version_number           2013-4
_shelx_res_checksum              11910