Halogenated Tetraphenylethene with Enhanced Aggregation-Induced Emission: Anomalous Anti-Heavy-Atom Effect and Self-Reversible Mechanochromism
Xu, Pengfei; Qiu, Qianqian; Ye, Xinru; Wei, Mengru; Xi, Wenbin; Feng, Hui; Qian, Zhaosheng; Chemical Communications  (2019) –; doi:10.1039/C9CC07045A

data_7124469
_publ_section_title
;
 Halogenated Tetraphenylethene with Enhanced Aggregation-Induced Emission:
 Anomalous Anti-Heavy-Atom Effect and Self-Reversible Mechanochromism
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC07045A
_journal_year                    2019
_chemical_formula_moiety         'C26 H16 I4, 1.5(H4 O2)'
_chemical_formula_sum            'C26 H22 I4 O3'
_chemical_formula_weight         890.03
_chemical_name_common            Tetraiodophenylethene
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_date             2019-11-11
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-11-11 deposited with the CCDC.	2019-11-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.6191(5)
_cell_length_b                   17.2316(6)
_cell_length_c                   18.9386(8)
_cell_measurement_reflns_used    9902
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      29.17
_cell_measurement_theta_min      2.37
_cell_volume                     3139.1(2)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_collection       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'XS (Sheldrick, 2008)'
_diffrn_ambient_temperature      273.15
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0280
_diffrn_reflns_av_unetI/netI     0.0268
_diffrn_reflns_Laue_measured_fraction_full 0.975
_diffrn_reflns_Laue_measured_fraction_max 0.965
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            33612
_diffrn_reflns_point_group_measured_fraction_full 0.979
_diffrn_reflns_point_group_measured_fraction_max 0.950
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.220
_diffrn_reflns_theta_min         2.364
_exptl_absorpt_coefficient_mu    3.992
_exptl_absorpt_correction_T_max  0.746
_exptl_absorpt_correction_T_min  0.463
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.883
_exptl_crystal_description       block
_exptl_crystal_F_000             1656
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.841
_refine_diff_density_min         -0.598
_refine_diff_density_rms         0.083
_refine_ls_abs_structure_details
;
 Flack x determined using 2427 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.011(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     301
_refine_ls_number_reflns         8873
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0597
_refine_ls_R_factor_gt           0.0432
_refine_ls_shift/su_max          4.761
_refine_ls_shift/su_mean         0.309
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0702P)^2^+1.6720P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1246
_refine_ls_wR_factor_ref         0.1342
_reflns_Friedel_coverage         0.775
_reflns_Friedel_fraction_full    0.985
_reflns_Friedel_fraction_max     0.932
_reflns_number_gt                6654
_reflns_number_total             8873
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc07045a4.cif
_cod_data_source_block           tpe-i_sqd
_cod_database_code               7124469
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.746
_shelx_estimated_absorpt_t_min   0.463
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All O(H,H) groups
2. Others
 Fixed Sof: I1A(0.5) I1B(0.5)
3.a Free rotating group:
 O1(H1A,H1B), O2(H2A,H2B), O3(H3A,H3B)
3.b Aromatic/amide H refined with riding coordinates:
 C4BA(H4BA), C4(H4), C5(H5), C7(H7), C9(H9), C10(H10), C12(H12), C13(H13),
 C15(H15), C16(H16), C18(H18), C19(H19), C21(H21), C22(H22), C24(H24), C25(H25)
;
_olex2_submission_special_instructions 'No special instructions were received'