Investigating the structure‒fluorescence properties of tetraphenylethylene fused imidazole AIEgens: reversible mechanofluorochromism and polymer matrix controlled fluorescence tuning
Nagarasu, Palaniyappan; Kundu, Anu; Thiruvenkatam, Vijay; Raghavaiah, Pallepogu; Anthony, Savarimuthu Philip; Madhu, Vedichi; CrystEngComm 23 (2021) 5403–5410; doi:10.1039/D1CE00561H

data_7243113
_publ_section_title
;
 Investigating the structure--fluorescence properties of
 tetraphenylethylene fused imidazole AIEgens: reversible
 mechanofluorochromism and polymer matrix controlled fluorescence tuning
;
_journal_issue                   31
_journal_name_full               CrystEngComm
_journal_page_first              5403
_journal_page_last               5410
_journal_paper_doi               10.1039/D1CE00561H
_journal_volume                  23
_journal_year                    2021
_chemical_formula_moiety         'C47 H33 F N2'
_chemical_formula_sum            'C47 H33 F N2'
_chemical_formula_weight         644.75
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2020-03-19
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2021-01-04 deposited with the CCDC.	2021-06-28 downloaded from the CCDC.
;
_cell_angle_alpha                98.441(4)
_cell_angle_beta                 94.465(3)
_cell_angle_gamma                114.358(3)
_cell_formula_units_Z            2
_cell_length_a                   9.3263(10)
_cell_length_b                   10.8791(12)
_cell_length_c                   19.822(2)
_cell_measurement_reflns_used    8838
_cell_measurement_temperature    273(2)
_cell_measurement_theta_max      23.24
_cell_measurement_theta_min      2.43
_cell_volume                     1790.8(3)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      273.15
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.995
_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  0.0774
_diffrn_reflns_av_unetI/netI     0.0497
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            45852
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.282
_diffrn_reflns_theta_min         2.426
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.073
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'color less'
_exptl_crystal_density_diffrn    1.196
_exptl_crystal_description       needle
_exptl_crystal_F_000             676
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.505
_refine_diff_density_min         -0.384
_refine_diff_density_rms         0.089
_refine_ls_extinction_coef       0.073(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     452
_refine_ls_number_reflns         6481
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.1720
_refine_ls_R_factor_gt           0.1461
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1492P)^2^+9.7189P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.4138
_refine_ls_wR_factor_ref         0.4278
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4710
_reflns_number_total             6481
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ce00561h2.cif
_cod_data_source_block           vjtpffb7_0m_a
_cod_depositor_comments
'Adding full bibliography for 7243111--7243113.cif.'
_cod_database_code               7243113
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.993
_shelx_estimated_absorpt_t_min   0.976
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C5(H5), C6(H6), C7(H7), C8(H8), C9(H9), C11(H11), C12(H12), C13(H13),
 C14(H14), C15(H15), C17(H17), C18(H18), C19(H19), C20(H20), C21(H21), C22(H22),
  C23(H23), C25(H25), C26(H26), C30(H30), C31(H31), C32(H32), C33(H33),
 C34(H34), C37(H37), C38(H38), C39(H39), C40(H40), C41(H41), C43(H43), C44(H44),
  C46(H46), C47(H47)
;
_shelx_res_checksum              98590
_shelx_hkl_checksum              48300
_olex2_submission_special_instructions 'No special instructions were received'