General Synthetic Approach toward Geminal-Substituted Tetraarylethene Fluorophores with Tunable Emission Properties: X-ray Crystallography, Aggregation-Induced Emission and Piezofluorochromism
Zhang, Guo-Feng; Wang, Hongfeng; Aldred, Matthew P.; Chen, Tao; Chen, Ze-Qiang; Meng, Xianggao; Zhu, Ming-Qiang; Chemistry of Materials 26 (2014) 4433–; doi:10.1021/cm501414b

data_4002031
_publ_section_title
;
 General Synthetic Approach toward Geminal-Substituted Tetraarylethene
 Fluorophores with Tunable Emission Properties: X-ray Crystallography,
 Aggregation-Induced Emission and Piezofluorochromism
;
_journal_issue                   15
_journal_name_full               'Chemistry of Materials'
_journal_page_first              4433
_journal_paper_doi               10.1021/cm501414b
_journal_volume                  26
_journal_year                    2014
_chemical_formula_moiety         'C42 H28'
_chemical_formula_sum            'C42 H28'
_chemical_formula_weight         532.64
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                87.6690(10)
_cell_angle_beta                 70.5610(10)
_cell_angle_gamma                79.6840(10)
_cell_formula_units_Z            2
_cell_length_a                   9.6966(8)
_cell_length_b                   11.6563(9)
_cell_length_c                   13.4072(10)
_cell_measurement_reflns_used    9697
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      32.00
_cell_measurement_theta_min      2.37
_cell_volume                     1405.60(19)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0660
_diffrn_reflns_av_sigmaI/netI    0.0493
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            15142
_diffrn_reflns_theta_full        30.50
_diffrn_reflns_theta_max         30.50
_diffrn_reflns_theta_min         1.61
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.259
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.468
_refine_diff_density_min         -0.308
_refine_diff_density_rms         0.067
_refine_ls_extinction_coef       0.021(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     380
_refine_ls_number_reflns         8423
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0545
_refine_ls_R_factor_gt           0.0460
_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^)+(0.0838P)^2^+0.2751P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1324
_refine_ls_wR_factor_ref         0.1438
_reflns_number_gt                7219
_reflns_number_total             8423
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cm501414b_si_002.cif
_cod_data_source_block           DPDAn(100K)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 4002028--4002033.cif.
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_cod_database_code               4002031