Polymorph-Dependent Multicolor-Switchable Mechanofluorochromism of 1-(9-Anthryl)vinyl-3-(3-pyridyl)vinylbenzene: Molecular Conformation versus Intermolecular Interaction
Li, Ye-Xin; Chen, You-Gui; Yu, Zhen-Feng; Yang, Xiao-Feng; Nie, Yong; Cui, Yu; Sun, Guo-Xin; The Journal of Physical Chemistry C  (2020) –; doi:10.1021/acs.jpcc.9b11180

data_1557214
_publ_section_title
;
 Polymorph-Dependent Multicolor-Switchable Mechanofluorochromism of
 1-(9-Anthryl)vinyl-3-(3-pyridyl)vinylbenzene: Molecular Conformation
 versus Intermolecular Interaction
;
_journal_name_full               'The Journal of Physical Chemistry C'
_journal_paper_doi               10.1021/acs.jpcc.9b11180
_journal_year                    2020
_chemical_formula_sum            'C29 H21 N'
_chemical_formula_weight         383.47
_space_group_crystal_system      tetragonal
_space_group_IT_number           85
_space_group_name_Hall           '-P 4a'
_space_group_name_H-M_alt        'P 4/n :2'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   27.4933(11)
_cell_length_b                   27.4933(11)
_cell_length_c                   5.8624(2)
_cell_measurement_reflns_used    9956
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      58.97
_cell_measurement_theta_min      2.80
_cell_volume                     4431.3(3)
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0606
_diffrn_reflns_av_unetI/netI     0.0262
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            52849
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        52.973
_diffrn_reflns_theta_max         52.973
_diffrn_reflns_theta_min         3.956
_exptl_absorpt_coefficient_mu    0.321
_exptl_crystal_density_diffrn    1.150
_exptl_crystal_description       block
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.080
_exptl_crystal_size_mid          0.060
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.730
_refine_diff_density_min         -0.211
_refine_diff_density_rms         0.033
_refine_ls_extinction_coef       0.0009(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     266
_refine_ls_number_reflns         3872
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0676
_refine_ls_R_factor_gt           0.0515
_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^)+(0.0738P)^2^+1.6779P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1395
_refine_ls_wR_factor_ref         0.1539
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3028
_reflns_number_total             3872
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jp9b11180_si_002.cif
_cod_data_source_block           20190121zh_znz9717_0m_a_sq
_cod_original_cell_volume        4431.3(4)
_cod_original_sg_symbol_H-M      'P 4/n'
_cod_database_code               1557214
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.975
_shelx_estimated_absorpt_t_max   0.984
_shelx_res_checksum              4412
_shelx_hkl_checksum              73803
_shelx_fab_checksum              59162