Polymorphism and Multicolor Mechanofluorochromism of a D-π-A Asymmetric 4H-Pyran Derivative with Aggregation-Induced Emission Property
Wang, Zhiqiang; Wang, Mengzhu; Peng, Jingqing; Xie, Yufeng; Liu, Miaochang; Gao, Wenxia; Zhou, Yunbing; Huang, Xiaobo; Wu, Huayue; The Journal of Physical Chemistry C  (2019) –; doi:10.1021/acs.jpcc.9b06912

data_1552547
_publ_section_title
;
 Polymorphism and Multicolor Mechanofluorochromism of a D-\p-A Asymmetric
 4H-Pyran Derivative with Aggregation-Induced Emission Property
;
_journal_name_full               'The Journal of Physical Chemistry C'
_journal_paper_doi               10.1021/acs.jpcc.9b06912
_journal_year                    2019
_chemical_formula_sum            'C22 H14 N2 O2'
_chemical_formula_weight         338.35
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 104.895(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.2416(6)
_cell_length_b                   19.5787(15)
_cell_length_c                   12.4951(10)
_cell_measurement_reflns_used    2880
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      54.877
_cell_measurement_theta_min      5.357
_cell_volume                     1712.0(2)
_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 0.992
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0405
_diffrn_reflns_av_unetI/netI     0.0496
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            8261
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.996
_diffrn_reflns_theta_min         2.679
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5615
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.313
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.190
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.130
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.047
_refine_ls_extinction_coef       0.032(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         3332
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0894
_refine_ls_R_factor_gt           0.0548
_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^)+(0.0752P)^2^+0.2925P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1334
_refine_ls_wR_factor_ref         0.1604
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2208
_reflns_number_total             3332
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jp9b06912_si_002.cif
_cod_data_source_block           mo_dd18200_0m
_cod_database_code               1552547
_shelx_estimated_absorpt_t_min   0.984
_shelx_estimated_absorpt_t_max   0.989
_shelxl_version_number           2013-4
_shelx_res_checksum              58653
_shelx_hkl_checksum              1829