Quinoxaline based D-A-D molecules: high contrast reversible solid-state mechano- and thermo-responsive fluorescent materials
Rajeswara Rao M; Chia-Wei Liao; Wei-Lin Su; Shih-Sheng Sun; Journal of Materials Chemistry C 1 (2013) 5491–5501; doi:10.1039/C3TC31179A

data_7233495
_publ_section_title
;
 Quinoxaline based D-A-D molecules: high contrast reversible solid-state
 mechano- and thermo-responsive fluorescent materials
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              5491
_journal_page_last               5501
_journal_paper_doi               10.1039/C3TC31179A
_journal_volume                  1
_journal_year                    2013
_chemical_formula_moiety         'C52 H30 N2'
_chemical_formula_sum            'C52 H30 N2'
_chemical_formula_weight         682.78
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 96.390(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   25.1073(11)
_cell_length_b                   11.3157(5)
_cell_length_c                   12.0314(5)
_cell_measurement_reflns_used    4785
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      27.18
_cell_measurement_theta_min      2.55
_cell_volume                     3397.0(3)
_computing_cell_refinement       'Bruker APEX2'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100.00(10)
_diffrn_measured_fraction_theta_full 1
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0372
_diffrn_reflns_av_unetI/netI     0.0465
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            14035
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         27.1
_diffrn_reflns_theta_min         1.63
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.9862
_exptl_absorpt_correction_T_min  0.9772
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS, 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.335
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1424
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.223
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     244
_refine_ls_number_reflns         3745
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0841
_refine_ls_R_factor_gt           0.0487
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0450P)^2^+2.0412P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1075
_refine_ls_wR_factor_ref         0.1237
_reflns_number_gt                2452
_reflns_number_total             3745
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000001.cif
_cod_data_source_block           PCOD1000001
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the built-in table derived from the
CIF Core dictionary named 'cif_core.dic' version 2.4.5 last updated
on 2014-11-21.

data item '_exptl_crystal_density_meas' value 'not measured' was
changed to '?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7233495