Fine-tuning of optical band gap in mixed halide aziridinium lead perovskites.
Kucheriv, Olesia I.; Haleliuk, Dmytro A.; Shova, Sergiu; Gural'skiy, Il'ya A.; Dalton transactions (Cambridge, England : 2003) 54 (2025) 1618–1624; doi:10.1039/d4dt02879a

data_7717594
_publ_section_title
;
 Fine-tuning of optical band gap in mixed halide aziridinium lead
 perovskites.
;
_journal_issue                   4
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1618
_journal_page_last               1624
_journal_paper_doi               10.1039/d4dt02879a
_journal_volume                  54
_journal_year                    2025
_chemical_formula_moiety         'Br1.958 I1.042 Pb, 4(C0.5 N0.25)'
_chemical_formula_sum            'C2 Br1.96 I1.04 N Pb'
_chemical_formula_weight         533.82
_space_group_crystal_system      cubic
_space_group_IT_number           221
_space_group_name_Hall           '-P 4 2 3'
_space_group_name_H-M_alt        'P m -3 m'
_audit_creation_date             2024-10-11
_audit_creation_method
;
Olex2 1.5
(compiled 2024.02.16 svn.r378c4104 for OlexSys, GUI svn.r6928)
;
_audit_update_record
;
2024-10-12 deposited with the CCDC.	2024-11-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            1
_cell_length_a                   6.10960(10)
_cell_length_b                   6.10960(10)
_cell_length_c                   6.10960(10)
_cell_measurement_reflns_used    503
_cell_measurement_temperature    230(2)
_cell_measurement_theta_max      70.7820
_cell_measurement_theta_min      7.2210
_cell_volume                     228.054(6)
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      230(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'XtaLAB Synergy, Duaflex, HyPix'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0174
_diffrn_reflns_av_unetI/netI     0.0079
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            570
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         70.779
_diffrn_reflns_theta_min         7.249
_exptl_absorpt_coefficient_mu    72.969
_exptl_crystal_colour            'clear dark red'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   dark
_exptl_crystal_colour_primary    red
_exptl_crystal_density_diffrn    3.887
_exptl_crystal_description       block
_exptl_crystal_F_000             225
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.670
_refine_diff_density_min         -0.768
_refine_diff_density_rms         0.141
_refine_ls_extinction_coef       0.0022(7)
_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   1.227
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     9
_refine_ls_number_reflns         69
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.216
_refine_ls_R_factor_all          0.0171
_refine_ls_R_factor_gt           0.0171
_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^)+(0.0428P)^2^+0.1732P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0578
_refine_ls_wR_factor_ref         0.0578
_reflns_Friedel_coverage         0.000
_reflns_number_gt                69
_reflns_number_total             69
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4dt02879a2.cif
_cod_data_source_block           shs_48_ilgu_auto
_cod_depositor_comments
'Adding full bibliography for 7717589--7717595.cif.'
_cod_original_cell_volume        228.054(11)
_cod_database_code               7717594
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.121
_shelx_estimated_absorpt_t_min   0.068
_olex2_refinement_description
;
1. Shared sites
{Br1, I1}
2. Restrained distances
 C1-C1_$1
 1.45 with sigma of 0.02
 C1_$2-N1_$3
 1.45 with sigma of 0.02
3. Uiso/Uaniso restraints and constraints
Uanis(Br1) = Uanis(I1)
Uiso(C1) = Uiso(N1)
4. Others
 Sof(I1)=0.0625*(1-FVAR(2))
 Sof(Br1)=0.0625*FVAR(2)
 Fixed Sof: C1(0.041675) N1(0.020825)
;
_shelx_res_checksum              49456
_shelx_hkl_checksum              2326
_olex2_submission_special_instructions 'No special instructions were received'