Aggregation-assisted energy gap modulation controls delayed emission in hybrid charge-transfer emitters.
Vinod, Kavya; Noushad, Najuma; Tanaka, Hidetoshi; Mohan, Nitha; Kokado, Yuya; Tomiya, Daiki; Kobori, Yasuhiro; Hariharan, Mahesh; Chemical science 16 (2025) 15546–15554; doi:10.1039/d5sc02071a

data_1575263
_publ_section_title
;
 Aggregation-assisted energy gap modulation controls delayed emission in
 hybrid charge-transfer emitters.
;
_journal_issue                   34
_journal_name_full               'Chemical science'
_journal_page_first              15546
_journal_page_last               15554
_journal_paper_doi               10.1039/d5sc02071a
_journal_volume                  16
_journal_year                    2025
_chemical_formula_moiety         'C20 H21 N O4'
_chemical_formula_sum            'C20 H21 N O4'
_chemical_formula_weight         339.38
_space_group_crystal_system      orthorhombic
_space_group_IT_number           29
_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2025-03-07 deposited with the CCDC.	2025-07-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.720(19)
_cell_length_b                   5.998(7)
_cell_length_c                   33.06(4)
_cell_measurement_reflns_used    1248
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      13.10
_cell_measurement_theta_min      2.38
_cell_volume                     3514(7)
_computing_cell_refinement       'APEX3/SAINT (Br uker, 2016)'
_computing_data_collection       'APEX3 (Bruker, 2016)'
_computing_data_reduction        'SAINT/XPREP (Bruker, 2016)'
_computing_molecular_graphics    'ORTEP3- 2014.1(Farrugia, 1997) '
_computing_publication_material  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker KAPPA 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  0.2390
_diffrn_reflns_av_unetI/netI     0.1682
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       39
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            39620
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        24.995
_diffrn_reflns_theta_max         24.995
_diffrn_reflns_theta_min         2.299
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.996
_exptl_absorpt_correction_T_min  0.969
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.283
_exptl_crystal_density_meas      1.283
_exptl_crystal_density_method    NONE
_exptl_crystal_description       needle
_exptl_crystal_F_000             1440
_exptl_crystal_size_max          0.350
_exptl_crystal_size_mid          0.085
_exptl_crystal_size_min          0.045
_refine_diff_density_max         0.224
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details
;
 Flack x determined using 799 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -1.5(10)
_refine_ls_extinction_coef       0.0077(17)
_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   1.003
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     452
_refine_ls_number_reflns         6180
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.2152
_refine_ls_R_factor_gt           0.0851
_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^)+(0.0899P)^2^+0.6279P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1844
_refine_ls_wR_factor_ref         0.2522
_reflns_Friedel_coverage         0.961
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                2560
_reflns_number_total             6180
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5sc02071a2.cif
_cod_data_source_block           shelx
_cod_depositor_comments
'Adding full bibliography for 1575263--1575264.cif.'
_cod_database_code               1575263
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.969
_shelx_estimated_absorpt_t_max   0.996
_shelx_res_checksum              78505