A convenient route to a vinylogous dicyano aryl based AIEgen with switchable mechanochromic luminescence properties.
Ghosh, Saurajit; Bhambri, Himanshi; Singh, Ajeet Kumar; Mandal, Sanjay K.; Roy, Lisa; Addy, Partha Sarathi; Chemical communications (Cambridge, England) 59 (2023) 4463–4466; doi:10.1039/d3cc00057e

data_7131390
_publ_section_title
;
 A convenient route to a vinylogous dicyano aryl based AIEgen with
 switchable mechanochromic luminescence properties.
;
_journal_issue                   30
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4463
_journal_page_last               4466
_journal_paper_doi               10.1039/d3cc00057e
_journal_volume                  59
_journal_year                    2023
_chemical_formula_moiety         'C16 H12 N4'
_chemical_formula_sum            'C16 H12 N4'
_chemical_formula_weight         260.301
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_Int_Tables_number      14
_audit_creation_method           'APEX3 v2018.7-2'
_audit_update_record
;
2023-02-23 deposited with the CCDC.	2023-03-07 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 105.787(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.742(2)
_cell_length_b                   5.2346(5)
_cell_length_c                   14.0627(14)
_cell_measurement_reflns_used    9700
_cell_measurement_temperature    102.(2)
_cell_measurement_theta_max      66.6954
_cell_measurement_theta_min      4.5877
_cell_volume                     1327.6(2)
_computing_cell_refinement       'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_data_reduction        'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_molecular_graphics    'Olex2 1.5-dev (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5-dev (Dolomanov et al., 2009)'
_computing_structure_refinement  'olex2.refine 1.5-dev (Bourhis et al., 2015)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      102.00
_diffrn_detector_area_resol_mean 7.3910
_diffrn_measured_fraction_theta_full 0.9962
_diffrn_measured_fraction_theta_max 0.9962
_diffrn_measurement_device_type  'Bruker Kappa APEX II'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0722
_diffrn_reflns_av_unetI/netI     0.0480
_diffrn_reflns_Laue_measured_fraction_full 0.9962
_diffrn_reflns_Laue_measured_fraction_max 0.9962
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            19721
_diffrn_reflns_point_group_measured_fraction_full 0.9962
_diffrn_reflns_point_group_measured_fraction_max 0.9962
_diffrn_reflns_theta_full        66.6993
_diffrn_reflns_theta_max         66.70
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    0.644
_exptl_absorpt_correction_T_max  0.7528
_exptl_absorpt_correction_T_min  0.6181
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 - Bruker AXS area detector scaling and absorption correction
;
_exptl_crystal_colour            red
_exptl_crystal_colour_primary    red
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.3808
_refine_diff_density_min         -0.3022
_refine_diff_density_rms         0.0920
_refine_ls_d_res_high            0.8393
_refine_ls_d_res_low             18.0350
_refine_ls_goodness_of_fit_ref   1.1234
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     289
_refine_ls_number_reflns         2344
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.1234
_refine_ls_R_factor_all          0.0337
_refine_ls_R_factor_gt           0.0274
_refine_ls_shift/su_max          -0.0002
_refine_ls_shift/su_mean         0.0000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0319P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0526
_refine_ls_wR_factor_ref         0.0535
_reflns_Friedel_coverage         0.0
_reflns_limit_h_max              21
_reflns_limit_h_min              -22
_reflns_limit_k_max              6
_reflns_limit_k_min              0
_reflns_limit_l_max              16
_reflns_limit_l_min              0
_reflns_number_gt                2237
_reflns_number_total             2344
_reflns_threshold_expression     I>=2u(I)
_cod_data_source_file            d3cc00057e2.cif
_cod_data_source_block           DCPV
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-Scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

 Adding full bibliography for 7131390--7131391.cif.
;
_cod_database_code               7131390
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
;
_olex2_refine_details
;
Refinement using NoSpherA2, an implementation of
NOn-SPHERical Atom-form-factors in Olex2.
Please cite:
F. Kleemiss et al. Chem. Sci. DOI 10.1039/D0SC05526C - 2021
NoSpherA2 implementation of HAR makes use of
tailor-made aspherical atomic form factors calculated
on-the-fly from a Hirshfeld-partitioned electron density (ED) - not from
spherical-atom form factors.

The ED is calculated from a gaussian basis set single determinant SCF
wavefunction - either Hartree-Fock or DFT using selected funtionals
 - for a fragment of the crystal.
This fragment can be embedded in an electrostatic crystal field by employing cluster charges
or modelled using implicit solvation models, depending on the software used.
The following options were used:
   SOFTWARE:       ORCA 5.0
   PARTITIONING:   NoSpherA2
   INT ACCURACY:   Normal
   METHOD:         R2SCAN
   BASIS SET:      cc-pVTZ
   CHARGE:         0
   MULTIPLICITY:   1
   DATE:           2023-01-05_17-21-55
;
_olex2_submission_special_instructions 'No special instructions were received'