Polyoxometalate-based metal-organic framework loading with ultra-low amount of Pt as efficient electrocatalyst for hydrogen production
Peng, Hai-Yue; Yang, Xiao-Jian; Ma, Yuan-Yuan; Liu, Jia-Ning; Wang, Yong-Hui; Tan, Huaqiao; Li, Yang-Guang; CrystEngComm  (2018) –; doi:10.1039/C8CE01151F

data_7231362
_publ_section_title
;
 Polyoxometalate-based metal-organic framework loading with ultra-low
 amount of Pt as efficient electrocatalyst for hydrogen production
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/C8CE01151F
_journal_year                    2018
_chemical_formula_moiety         '0.5(C96 H80 Mo48 N32 O144 Zn16), 4(O2 P0.5)'
_chemical_formula_sum            'C48 H40 Mo24 N16 O80 P2 Zn8'
_chemical_formula_weight         5008.42
_space_group_crystal_system      tetragonal
_space_group_IT_number           141
_space_group_name_Hall           '-I 4bd 2'
_space_group_name_H-M_alt        'I 41/a m d'
_symmetry_space_group_name_Hall  '-I 4bd 2'
_symmetry_space_group_name_H-M   'I 41/a m d :2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2018-06-06
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-07-08 deposited with the CCDC.
2018-08-13 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   27.560(4)
_cell_length_b                   27.560(4)
_cell_length_c                   12.012(2)
_cell_measurement_reflns_used    33264
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.05
_cell_measurement_theta_min      3.16
_cell_volume                     9124(2)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1198
_diffrn_reflns_av_unetI/netI     0.0659
_diffrn_reflns_Laue_measured_fraction_full 0.980
_diffrn_reflns_Laue_measured_fraction_max 0.980
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            32676
_diffrn_reflns_point_group_measured_fraction_full 0.980
_diffrn_reflns_point_group_measured_fraction_max 0.980
_diffrn_reflns_theta_full        24.991
_diffrn_reflns_theta_max         24.991
_diffrn_reflns_theta_min         3.159
_exptl_absorpt_coefficient_mu    2.700
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            black
_exptl_crystal_colour_primary    black
_exptl_crystal_density_diffrn    1.823
_exptl_crystal_description       block
_exptl_crystal_F_000             4716
_exptl_crystal_size_max          0.03
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.217
_refine_diff_density_min         -1.409
_refine_diff_density_rms         0.180
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         2068
_refine_ls_number_restraints     180
_refine_ls_restrained_S_all      1.011
_refine_ls_R_factor_all          0.0778
_refine_ls_R_factor_gt           0.0669
_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^)+(0.0870P)^2^+155.9737P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1675
_refine_ls_wR_factor_ref         0.1782
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1720
_reflns_number_total             2068
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8ce01151f2.cif
_cod_data_source_block           4_sq
_cod_original_cell_volume        9124(3)
_cod_database_code               7231362
_shelx_shelxl_version_number     2018/1
_shelx_estimated_absorpt_t_max   0.948
_shelx_estimated_absorpt_t_min   0.923
_olex2_refinement_description
;
1. Fixed Uiso
 At 1 times of:
  H4 of C4, H3 of C3
 At 1.2 times of:
  H1 of C1, H7 of C7, H5 of C5
2. Uiso/Uaniso restraints and constraints
C1 \\sim C2 \\sim C3 \\sim C4 \\sim C5 \\sim C7 \\sim N1 \\sim N2: within 3.8A
with sigma of 0.01 and sigma for terminal atoms of 0.02
Uanis(N1) \\sim Ueq, Uanis(N2) \\sim Ueq, Uanis(C5) \\sim Ueq, Uanis(C7) \\sim
Ueq, Uanis(C3) \\sim Ueq, Uanis(C4) \\sim Ueq: with sigma of 0.01 and sigma for
terminal atoms of 0.02
3.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C3(H3), C4(H4), C5(H5), C7(H7)
;
_shelx_res_checksum              74291
_shelx_fab_checksum              15228
_olex2_submission_special_instructions 'No special instructions were received'