Self-reversible mechanofluorochromic AIEgens with tunable solid-state fluorescence: effect of acceptors and intermolecular interactions
Ravi, Sasikala; Priyadharsan, R. Rameshbabu; Karthikeyan, Subramanian; Pannipara, Mehboobali; Al-Sehemi, Abdullah G.; Moon, Dohyun; Anthony, Savarimuthu Philip; CrystEngComm 26 (2024) 5241–5248; doi:10.1039/D4CE00729H

data_7249232
_publ_section_title
;
 Self-reversible mechanofluorochromic AIEgens with tunable solid-state
 fluorescence: effect of acceptors and intermolecular interactions
;
_journal_issue                   37
_journal_name_full               CrystEngComm
_journal_page_first              5241
_journal_page_last               5248
_journal_paper_doi               10.1039/D4CE00729H
_journal_volume                  26
_journal_year                    2024
_chemical_formula_moiety         'C25 H20 N2 O3'
_chemical_formula_sum            'C25 H20 N2 O3'
_chemical_formula_weight         396.43
_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'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2019/3
_audit_update_record
;
2024-07-18 deposited with the CCDC.	2024-08-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 123.79(3)
_cell_angle_gamma                90
_cell_formula_units_Z            8
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_cell_length_b                   18.111(4)
_cell_length_c                   14.354(3)
_cell_measurement_reflns_used    57480
_cell_measurement_temperature    220(2)
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_cell_measurement_theta_min      0.361
_cell_volume                     3878(2)
_computing_cell_refinement       '<i>HKL3000sm</i>(Otwinowski & Minor, 1997)'
_computing_data_collection
'<i>PAL BL2D-SMDC Program</i>(Shin et.al, 2016)'
_computing_data_reduction        '<i>HKL3000sm</i>(Otwinowski & Minor, 1997)'
_computing_molecular_graphics    '<i>DIAMOND 4</i>(Putx&Brandenburg, 2014)'
_computing_publication_material  '<i>publCIF</i>(Westrip, 2010)'
_computing_structure_refinement  '<i>SHELXL-2018</i>(Sheldrick, 2018)'
_computing_structure_solution    '<i>SHELXT-2018</i>(Sheldrick, 2018)'
_diffrn_ambient_temperature      220(2)
_diffrn_measured_fraction_theta_full 0.977
_diffrn_measured_fraction_theta_max 0.967
_diffrn_measurement_device_type  'Rayonix SX165 CCD area detector'
_diffrn_measurement_method       'omega scan'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.630
_diffrn_reflns_av_R_equivalents  0.0549
_diffrn_reflns_av_unetI/netI     0.0430
_diffrn_reflns_Laue_measured_fraction_full 0.977
_diffrn_reflns_Laue_measured_fraction_max 0.967
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       25
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_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            20192
_diffrn_reflns_point_group_measured_fraction_full 0.977
_diffrn_reflns_point_group_measured_fraction_max 0.967
_diffrn_reflns_theta_full        22.210
_diffrn_reflns_theta_max         25.999
_diffrn_reflns_theta_min         1.568
_diffrn_source                   'PLSII 2D bending magnet'
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.980
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
'<i>HKL3000sm Scalepack</i>(Otwinowski et.al,2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.358
_exptl_crystal_description       block
_exptl_crystal_F_000             1664
_exptl_crystal_size_max          0.051
_exptl_crystal_size_mid          0.038
_exptl_crystal_size_min          0.029
_refine_diff_density_max         0.286
_refine_diff_density_min         -0.281
_refine_diff_density_rms         0.053
_refine_ls_extinction_coef       0.0120(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2019/2 (Sheldrick 2019)'
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     274
_refine_ls_number_reflns         5296
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0620
_refine_ls_R_factor_gt           0.0454
_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^)+(0.0647P)^2^+0.7741P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1152
_refine_ls_wR_factor_ref         0.1241
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3992
_reflns_number_total             5296
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ce00729h2.cif
_cod_data_source_block           SPA937
_cod_depositor_comments
'Adding full bibliography for 7249231--7249233.cif.'
_cod_original_cell_volume        3877.9(18)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7249232
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_min   0.996
_shelx_estimated_absorpt_t_max   0.998
_shelx_res_checksum              39174
_shelx_hkl_checksum              94362