Precise peripheral design enables propeller-like squaraine dye with highly sensitive and wide-range piezochromism.
Guo, Weihan; Wang, Mingda; Si, Leilei; Wang, Yigang; Xia, Guomin; Wang, Hongming; Chemical science 14 (2023) 6348–6354; doi:10.1039/d3sc01730c

data_1569191
_publ_section_title
;
 Precise peripheral design enables propeller-like squaraine dye with
 highly sensitive and wide-range piezochromism.
;
_journal_issue                   23
_journal_name_full               'Chemical science'
_journal_page_first              6348
_journal_page_last               6354
_journal_paper_doi               10.1039/d3sc01730c
_journal_volume                  14
_journal_year                    2023
_chemical_formula_moiety         '0.095(C28 H20 N2 O2)'
_chemical_formula_sum            'C28 H20 N2 O2'
_chemical_formula_weight         416.46
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_block_doi                 10.5517/ccdc.csd.cc2f4wvb
_audit_creation_date             2023-01-31
_audit_creation_method
;
Olex2 1.3
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6408)
;
_audit_update_record
;
2023-01-31 deposited with the CCDC.	2023-05-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 95.536(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.9476(2)
_cell_length_b                   5.84090(10)
_cell_length_c                   15.0139(3)
_cell_measurement_reflns_used    5283
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      75.2710
_cell_measurement_theta_min      4.5300
_cell_volume                     1042.85(3)
_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      100.0
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'multiwire proportional'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0465
_diffrn_reflns_av_unetI/netI     0.0363
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.972
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            9565
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.972
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         75.870
_diffrn_reflns_theta_min         4.523
_exptl_absorpt_coefficient_mu    0.668
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.326
_exptl_crystal_description       needle
_exptl_crystal_F_000             436
_exptl_crystal_size_max          0.6
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.250
_refine_diff_density_min         -0.218
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         2109
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0432
_refine_ls_R_factor_gt           0.0395
_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^)+(0.0486P)^2^+0.3923P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1022
_refine_ls_wR_factor_ref         0.1054
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1892
_reflns_number_total             2170
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3sc01730c2.cif
_cod_data_source_block           erbenan-1
_cod_depositor_comments
'Adding full bibliography for 1569190--1569193.cif.'
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1569191
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C6(H6), C7(H7), C8(H8), C10(H10), C11(H11), C12(H12),
 C13(H13), C14(H14)
;
_shelx_res_checksum              33029
_shelx_hkl_checksum              96186
_olex2_submission_special_instructions 'No special instructions were received'