Secondary ligand-directed assembly of metal‒organic coordination polymers based on a 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylic acid ligand: Syntheses, structures and photoluminescent properties
Yuan, Gang; Shao, Kui-Zhan; Du, Dong-Ying; Wang, Xin-Long; Su, Zhong-Min; Ma, Jian-Fang; CrystEngComm 14 (2012) 1865–; doi:10.1039/c1ce06178j

data_7207354
_publ_section_title
;
 Secondary ligand-directed assembly of metal--organic coordination
 polymers based on a 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylic acid
 ligand: Syntheses, structures and photoluminescent properties
;
_journal_issue                   5
_journal_name_full               CrystEngComm
_journal_page_first              1865
_journal_paper_doi               10.1039/c1ce06178j
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         'C30 H18 Cd2 N8 O8'
_chemical_formula_sum            'C30 H18 Cd2 N8 O8'
_chemical_formula_weight         843.32
_chemical_name_systematic        ?
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.860(4)
_cell_length_b                   15.780(3)
_cell_length_c                   13.325(3)
_cell_measurement_reflns_used    1286
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.85
_cell_measurement_theta_min      3.52
_cell_volume                     2914.3(12)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SMART'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.948
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'Bruker Smart ApexII CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0558
_diffrn_reflns_av_sigmaI/netI    0.0762
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            17410
_diffrn_reflns_theta_full        28.32
_diffrn_reflns_theta_max         28.32
_diffrn_reflns_theta_min         1.29
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.528
_exptl_absorpt_correction_T_max  0.730
_exptl_absorpt_correction_T_min  0.624
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2004)'
_exptl_crystal_colour            light-yellow
_exptl_crystal_density_diffrn    1.922
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1656
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.430
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.096
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.04(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.964
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     441
_refine_ls_number_reflns         6778
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      0.964
_refine_ls_R_factor_all          0.0682
_refine_ls_R_factor_gt           0.0406
_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^)+(0.0151P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0545
_refine_ls_wR_factor_ref         0.0616
_reflns_number_gt                5081
_reflns_number_total             6778
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c1ce06178j.txt
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        2914.3(18)
_cod_database_code               7207354