Quenching of tryptophan fluorescence in various proteins by a series of small nickel complexes.
Crouse, Heather F.; Potoma, Julianne; Nejrabi, Farhat; Snyder, Deanna L.; Chohan, Balwant S.; Basu, Swarna; Dalton transactions (Cambridge, England : 2003) 41 (2012) 2720–2731; doi:10.1039/c2dt12169g

data_7018248
_publ_section_title
;
 Quenching of tryptophan fluorescence in various proteins by a series of
 small nickel complexes.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2720
_journal_page_last               2731
_journal_paper_doi               10.1039/c2dt12169g
_journal_volume                  41
_journal_year                    2012
_chemical_formula_moiety         'C15 H32 N4 Ni O2 S2, 2(C H4 O), 2(I)'
_chemical_formula_sum            'C17 H40 I2 N4 Ni O4 S2'
_chemical_formula_weight         741.16
_chemical_name_systematic        ?
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2011-09-12 # Formatted by publCIF
;
_cell_angle_alpha                87.671(2)
_cell_angle_beta                 78.132(2)
_cell_angle_gamma                72.023(2)
_cell_formula_units_Z            2
_cell_length_a                   10.4046(12)
_cell_length_b                   10.9123(12)
_cell_length_c                   13.8838(16)
_cell_measurement_reflns_used    6974
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.167
_cell_measurement_theta_min      2.320
_cell_volume                     1466.9(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      298(2)
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device_type  'CCD area detector'
_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     0.71073
_diffrn_reflns_av_R_equivalents  0.0130
_diffrn_reflns_av_sigmaI/netI    0.0206
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            14030
_diffrn_reflns_theta_full        28.26
_diffrn_reflns_theta_max         28.26
_diffrn_reflns_theta_min         1.96
_exptl_absorpt_coefficient_mu    2.934
_exptl_absorpt_correction_T_max  0.542
_exptl_absorpt_correction_T_min  0.349
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS: Siemens Industrial Automation, Inc. Madison, WI, 1996
;
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.678
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.21
_refine_diff_density_max         2.983
_refine_diff_density_min         -1.825
_refine_diff_density_rms         0.118
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         7086
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0564
_refine_ls_R_factor_gt           0.0490
_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^)+(0.0820P)^2^+2.2602P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1386
_refine_ls_wR_factor_ref         0.1446
_reflns_number_gt                5972
_reflns_number_total             7086
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt12169g.txt
_cod_data_source_block           btw5s
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7018248