High Capacity Hydrogen Adsorption in Cu(II) Tetracarboxylate Framework Materials: The Role of Pore Size, Ligand Functionalization, and Exposed Metal Sites
Xiang Lin; Irvin Telepeni; Alexander J. Blake; Anne Dailly; Craig M. Brown; Jason M. Simmons; Marco Zoppi; Gavin S. Walker; K. Mark Thomas; Timothy J. Mays; Peter Hubberstey; Neil R. Champness; Martin Schröder; Journal of the American Chemical Society 131 (2009) 2159–2171; doi:10.1021/ja806624j

data_4103899
_publ_section_title
;
 High Capacity Hydrogen Adsorption in Cu(II) Tetracarboxylate Framework
 Materials: The Role of Pore Size, Ligand Functionalization, and Exposed
 Metal Sites
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2159
_journal_page_last               2171
_journal_paper_doi               10.1021/ja806624j
_journal_volume                  131
_journal_year                    2009
_chemical_formula_moiety         'C26 H16 Cu2 O10, 3(C3 H7 N O), 3(H2 O)'
_chemical_formula_structural
;
[Cu2 (C26 O8 H12) (H2O)2] (C3 H7 N O)3 (H2 O)3
;
_chemical_formula_sum            'C35 H43 Cu2 N3 O16'
_chemical_formula_weight         888.80
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           166
_symmetry_cell_setting           rhombohedral
_symmetry_space_group_name_Hall  '-R 3 2"'
_symmetry_space_group_name_H-M   'R -3 m :H'
_atom_sites_solution_hydrogens
;
only hydrogen atoms on the non-disordered carbon atoms are added geometrically
;
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            9
_cell_length_a                   18.513(1)
_cell_length_b                   18.513(1)
_cell_length_c                   45.354(5)
_cell_measurement_reflns_used    5288
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      22.09
_cell_measurement_theta_min      2.20
_cell_volume                     13461.7(18)
_computing_cell_refinement       'Bruker SAINT version 6.36A (Bruker, 2000)'
_computing_data_collection       'Bruker SMART version 5.625 (Bruker, 2001)'
_computing_data_reduction        'Bruker SAINT; SHELXTL (Sheldrick, 2008)'
_computing_publication_material
;
enCIFer (Allen et al., 2004); PLATON (Spek, 2003)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.059
_diffrn_reflns_av_sigmaI/netI    0.048
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       55
_diffrn_reflns_limit_l_min       -53
_diffrn_reflns_number            49853
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         2.20
_exptl_absorpt_coefficient_mu    0.760
_exptl_absorpt_correction_T_max  0.912
_exptl_absorpt_correction_T_min  0.852
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SHELXTL XPREP v5.625'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    0.987
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4140
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_platon_squeeze_details
; 
Approximately 65.8% of the unit cell volume comprises a large region of
disordered solvent which could not be modelled as discrete atomic sites. 
We employed PLATON SQUEEZE to calculate the contribution to the diffraction
from the solvent region and thereby produced a set of solvent-free diffraction
intensities. SQUEEZE estimated a total count of 1177 electrons per unit cell.
The final formula was calculated from the SQUEEZE results combined with
elemental analysis data.
;
_refine_diff_density_max         0.87
_refine_diff_density_min         -0.33
_refine_diff_density_rms         0.08
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.99
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     83
_refine_ls_number_reflns         2879
_refine_ls_number_restraints     55
_refine_ls_restrained_S_all      1.02
_refine_ls_R_factor_all          0.161
_refine_ls_R_factor_gt           0.113
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.312
_refine_ls_wR_factor_ref         0.336
_reflns_number_gt                1299
_reflns_number_total             3327
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            ja806624j_si_002_1.cif
_cod_data_source_block           NOTT103
_cod_original_cell_volume        13462(4)
_cod_original_sg_symbol_H-M      'R -3 m'
_cod_database_code               4103899