2D Chiral Organic Salts with Large Piezoelectric Response
Lv, Hui-Peng; Liao, Zhi-Lin; Gao, Di; Jiang, Kai-Wen; Yu, Si-Qi; Lei, Yi; Liu, Jian-Chun; Geng, Yi-Zhuo; Ai, Yong; Li, Peng-Fei; Qin, Yan; Chen, Xiao-Gang; Materials Horizons  (2026) –; doi:10.1039/D6MH00256K

data_1577019
_publ_section_title
;
 2D Chiral Organic Salts with Large Piezoelectric Response
;
_journal_name_full               'Materials Horizons'
_journal_paper_doi               10.1039/D6MH00256K
_journal_year                    2026
_chemical_formula_moiety         'C8 H11 Br N, Cl'
_chemical_formula_sum            'C8 H11 Br Cl N'
_chemical_formula_weight         236.54
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2025-11-18
_audit_creation_method
;
Olex2 1.3
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6408)
;
_audit_update_record
;
2025-12-17 deposited with the CCDC.	2026-03-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 94.0673(16)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.47653(10)
_cell_length_b                   7.02250(13)
_cell_length_c                   13.0992(2)
_cell_measurement_reflns_used    4389
_cell_measurement_temperature    300.00(10)
_cell_measurement_theta_max      71.4800
_cell_measurement_theta_min      3.3680
_cell_volume                     502.512(15)
_computing_cell_refinement       'CrysAlisPro 1.171.43.129a (Rigaku OD, 2024)'
_computing_data_collection
'CrysAlisPro system (CCD 43.129a 64-bit (release 29-06-2024))'
_computing_data_reduction        'CrysAlisPro 1.171.43.129a (Rigaku OD, 2024)'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      300.15
_diffrn_detector_area_resol_mean 10.0000
_diffrn_detector_type            'HyPix-Arc 150'
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w     40.00 106.00   0.50    0.05    --   60.23  15.00-150.00  132
  2  \w     40.00 106.00   0.50    0.05    --   60.23  15.00 -90.00  132
  3  \w     40.00 106.00   0.50    0.05    --   60.23  15.00  90.00  132
  4  \w     55.00 121.00   0.50    0.05    --   74.99  15.00 150.00  132
  5  \w     55.00 121.00   0.50    0.05    --   74.99  15.00  90.00  132
  6  \w     55.00 121.00   0.50    0.05    --   74.99  15.00  30.00  132
  7  \w     40.00 106.00   0.50    0.05    --   60.23  15.00   0.00  132
  8  \w     40.00  81.00   0.50    0.05    --   60.23  15.00 -30.00   82
  9  \w     21.00  70.00   0.50    0.05    --   60.23-101.00 -80.00   98
 10  \w     18.00  84.00   0.50    0.05    --   60.23-125.00-120.00  132
 11  \w     33.00  99.00   0.50    0.05    --   75.12-125.00 -30.00  132
 12  \w     35.00  85.00   0.50    0.05    --   74.99-101.00 -80.00  100
 13  \w     18.00  84.00   0.50    0.05    --   60.23-125.00   0.00  132
 14  \w     33.00  99.00   0.50    0.05    --   75.12-125.00  60.00  132
 15  \w     18.00  84.00   0.50    0.05    --   60.23-125.00 150.00  132
 16  \w   -121.00 -57.00   0.50    0.05    --  -75.30 -15.00-120.00  128
 17  \w   -121.00 -57.00   0.50    0.05    --  -75.30 -15.00-180.00  128
 18  \w    -99.00 -32.00   0.50    0.05    --  -75.30 125.00-180.00  134
 19  \w    -99.00 -32.00   0.50    0.05    --  -75.30 125.00 -60.00  134
 20  \w    -85.00 -35.00   0.50    0.05    --  -75.30 101.00  23.00  100
 21  \w    -70.00 -21.00   0.50    0.05    --  -60.41 101.00  23.00   98
 22  \w    -98.00 -31.00   0.50    0.05    --  -74.13 125.00  90.00  134
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB Synergy R, DW system, HyPix-Arc 150'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0380
_diffrn_reflns_av_unetI/netI     0.0258
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            4930
_diffrn_reflns_point_group_measured_fraction_full 0.949
_diffrn_reflns_point_group_measured_fraction_max 0.923
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         71.594
_diffrn_reflns_theta_min         3.382
_exptl_absorpt_coefficient_mu    7.538
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.58599
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.43.129a (Rigaku Oxford Diffraction, 2024)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.563
_exptl_crystal_description       plate
_exptl_crystal_F_000             236
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.533
_refine_diff_density_min         -0.483
_refine_diff_density_rms         0.079
_refine_ls_abs_structure_details
;
 Flack x determined using 698 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.04(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.199
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     102
_refine_ls_number_reflns         1802
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.198
_refine_ls_R_factor_all          0.0485
_refine_ls_R_factor_gt           0.0475
_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^)+(0.0997P)^2^+0.0623P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1484
_refine_ls_wR_factor_ref         0.1492
_reflns_Friedel_coverage         0.731
_reflns_Friedel_fraction_full    0.892
_reflns_Friedel_fraction_max     0.853
_reflns_number_gt                1733
_reflns_number_total             1802
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d6mh00256k2.cif
_cod_data_source_block           r_4_br_afla_ba_cl_300k_auto
_cod_original_cell_volume        502.511(15)
_cod_database_code               1577019
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.584
_shelx_estimated_absorpt_t_min   0.398
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H,H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C2(H2)
2.b Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C7(H7), C8(H8)
2.c Idealised Me refined as rotating group:
 N1(H1A,H1B,H1C), C1(H1D,H1E,H1F)
;
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;