Stimuli-responsive switching of magnetic properties and solid-state colors for 2,3'-biimidazo[1,2-a]pyridin-2'-one radical derivatives
Guo-Ping Yong; Yu-Mei Zhao; Ya Feng; Journal of Materials Chemistry C 2 (2014) 2228–2234; doi:10.1039/C3TC32130D

data_7233649
_publ_section_title
;
 Stimuli-responsive switching of magnetic properties and solid-state
 colors for 2,3'-biimidazo[1,2-a]pyridin-2'-one radical derivatives
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              2228
_journal_page_last               2234
_journal_paper_doi               10.1039/C3TC32130D
_journal_volume                  2
_journal_year                    2014
_chemical_formula_sum            'C23 H20 N4 O4'
_chemical_formula_weight         416.43
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
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_cell_angle_beta                 106.218(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.0290(3)
_cell_length_b                   18.9754(9)
_cell_length_c                   13.3607(5)
_cell_measurement_reflns_used    3935
_cell_measurement_temperature    290(2)
_cell_measurement_theta_max      69.5828
_cell_measurement_theta_min      3.4422
_cell_volume                     1954.55(14)
_computing_cell_refinement       'CrysAlisPro (Agilent Technologies)'
_computing_data_collection       'CrysAlisPro (Agilent Technologies)'
_computing_data_reduction        'CrysAlisPro (Agilent Technologies)'
_computing_molecular_graphics    'Ortep-3 (L. J. Farrugia, 2001)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 15.9149
_diffrn_measured_fraction_theta_full 0.972
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Gemini S Ultra, Agilent Technologies'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0310
_diffrn_reflns_av_sigmaI/netI    0.0261
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            10835
_diffrn_reflns_theta_full        69.71
_diffrn_reflns_theta_max         69.71
_diffrn_reflns_theta_min         4.16
_exptl_absorpt_coefficient_mu    0.816
_exptl_absorpt_correction_T_max  0.7859
_exptl_absorpt_correction_T_min  0.7576
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.21 (release 14-08-2012 CrysAlis171 .NET)
(compiled Sep 14 2012,17:21:16)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_density_diffrn    1.415
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             872
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.31
_refine_diff_density_max         0.517
_refine_diff_density_min         -0.487
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     291
_refine_ls_number_reflns         3589
_refine_ls_number_restraints     43
_refine_ls_restrained_S_all      1.142
_refine_ls_R_factor_all          0.0992
_refine_ls_R_factor_gt           0.0841
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0896P)^2^+1.9323P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2162
_refine_ls_wR_factor_ref         0.2295
_reflns_number_gt                2761
_reflns_number_total             3589
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000003.cif
_cod_data_source_block           PCOD1000003
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7233649