Brightly emissive octahedral Cu<sub>4</sub>X<sub>4</sub> clusters showing polymorphic-dependent and mechanochromic phosphorescence.
Baranov, Andrey Yu; Doronina, Evgeniya P.; Bagryanskaya, Irina Yu; Metlina, Daria A.; Rakhmanova, Mariana I.; Taydakov, Ilya V.; Artem'ev, Alexander V.; Dalton transactions (Cambridge, England : 2003) 54 (2025) 7014–7022; doi:10.1039/d5dt00103j

data_7718409
_publ_section_title
;
 Brightly emissive octahedral Cu<sub>4</sub>X<sub>4</sub> clusters showing
 polymorphic-dependent and mechanochromic phosphorescence.
;
_journal_issue                   17
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7014
_journal_page_last               7022
_journal_paper_doi               10.1039/d5dt00103j
_journal_volume                  54
_journal_year                    2025
_chemical_formula_moiety         'C28 H34 Cu4 I4 N4 P2'
_chemical_formula_sum            'C28 H34 Cu4 I4 N4 P2'
_chemical_formula_weight         1250.29
_chemical_name_systematic
;
 copper iodide complex with bis(2-pyridyl)-t-butylphosphine (polymorph 1)
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2025-03-20 deposited with the CCDC.	2025-03-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 102.280(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.4354(15)
_cell_length_b                   14.921(2)
_cell_length_c                   13.4326(19)
_cell_measurement_reflns_used    9919
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.46
_cell_measurement_theta_min      2.41
_cell_volume                     1847.8(5)
_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-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0592
_diffrn_reflns_av_unetI/netI     0.0357
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20624
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.349
_diffrn_reflns_theta_min         2.066
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    5.723
_exptl_absorpt_correction_T_max  0.9281
_exptl_absorpt_correction_T_min  0.6899
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.247
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate-prism
_exptl_crystal_F_000             1176
_exptl_crystal_size_max          0.250
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.080
_refine_diff_density_max         1.077
_refine_diff_density_min         -1.266
_refine_diff_density_rms         0.319
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3379
_refine_ls_number_restraints     78
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0412
_refine_ls_R_factor_gt           0.0335
_refine_ls_shift/su_max          0.016
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0191P)^2^+9.9534P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0801
_refine_ls_wR_factor_ref         0.0852
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3024
_reflns_number_total             3379
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5dt00103j2.cif
_cod_data_source_block           6a_bupy2
_cod_depositor_comments
'Adding full bibliography for 7718408--7718415.cif.'
_cod_original_cell_volume        1847.9(5)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7718409
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.329
_shelx_estimated_absorpt_t_max   0.657
_shelx_res_checksum              87878
_shelx_hkl_checksum              37074