Structure-activity relationship for the solid state emission of a new family of "push-pull"π-extended chromophores.
Nitti, Andrea; Villafiorita-Monteleone, Francesca; Pacini, Aurora; Botta, Chiara; Virgili, Tersilla; Forni, Alessandra; Cariati, Elena; Boiocchi, Massimo; Pasini, Dario; Faraday discussions 196 (2017) 143–161; doi:10.1039/c6fd00161k

data_1543732
_publ_section_title
;
 Structure-activity relationship for the solid state emission of a new
 family of &quot;push-pull&quot;\p-extended chromophores.
;
_journal_name_full               'Faraday discussions'
_journal_page_first              143
_journal_page_last               161
_journal_paper_doi               10.1039/c6fd00161k
_journal_volume                  196
_journal_year                    2017
_chemical_formula_moiety         'C18 H14 N2 O2'
_chemical_formula_sum            'C18 H14 N2 O2'
_chemical_formula_weight         290.31
_chemical_name_systematic
;
1,1-Dicyano-2,2-bis(4-dimethoxyphenyl)ethylene
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-06-27 deposited with the CCDC.
2016-07-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 110.164(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.518(4)
_cell_length_b                   8.6661(15)
_cell_length_c                   10.772(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      16
_cell_measurement_theta_min      8
_cell_volume                     1535.1(6)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Mercury (Macrae et al., 2008)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Enraf-Nonius CAD4'
_diffrn_measurement_method       'profiled omega 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  0.0182
_diffrn_reflns_av_unetI/netI     0.0268
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2340
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.978
_diffrn_reflns_theta_min         2.477
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  300
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.999
_exptl_absorpt_correction_T_min  0.933
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
;
North A.C.T., Phillips D.C. & Mathews F.S. (1968) Acta. Cryst. A24, 351
;
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.256
_exptl_crystal_description       prism
_exptl_crystal_F_000             608
_exptl_crystal_preparation       ', Luminescent'
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.75
_exptl_crystal_size_mid          0.55
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.170
_refine_diff_density_min         -0.175
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.007
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2234
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_all          0.0882
_refine_ls_R_factor_gt           0.0491
_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^)+(0.0529P)^2^+0.4134P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1127
_refine_ls_wR_factor_ref         0.1323
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1378
_reflns_number_total             2234
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6fd00161k2.cif
_cod_data_source_block           5b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'PSI-SCAN' changed to
'psi-scan' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/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 4268 2015-11-12 08:31:59Z antanas 

 Adding full bibliography for 1543731--1543732.cif.
;
_cod_database_code               1543732
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              97171
_solvent_exptl_crystal_recrystallization_method CDCl3