A Highly Selective On/Off Fluorescence Sensor for Cadmium(II)
Qiang Zhao; Rui-Fang Li; Sheng-Kai Xing; Xiu-Ming Liu; Tong-Liang Hu; Xian-He Bu; Inorganic Chemistry 50 (2011) 10041–10046; doi:10.1021/ic2008182

data_4326457
_publ_section_title
;
 A Highly Selective On/Off Fluorescence Sensor for Cadmium(II)
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              10041
_journal_page_last               10046
_journal_paper_doi               10.1021/ic2008182
_journal_volume                  50
_journal_year                    2011
_chemical_formula_sum            'C42 H24 Cd4 Cl0 N20 O32'
_chemical_formula_weight         1770.41
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 110.86(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   22.675(5)
_cell_length_b                   15.860(3)
_cell_length_c                   18.331(4)
_cell_measurement_reflns_used    27802
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.6
_cell_measurement_theta_min      3.1
_cell_volume                     6160(3)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        CrystalStructure
_computing_publication_material  'CrystalStructure 3.7.0'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  SCX-MINI
_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  0.0543
_diffrn_reflns_av_sigmaI/netI    0.0428
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            32109
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.14
_exptl_absorpt_coefficient_mu    1.471
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.909
_exptl_crystal_description       Prism
_exptl_crystal_F_000             3456
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         1.268
_refine_diff_density_min         -0.946
_refine_diff_density_rms         0.112
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     444
_refine_ls_number_reflns         7064
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0759
_refine_ls_R_factor_gt           0.0543
_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^)+(0.0573P)^2^+32.3337P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1250
_refine_ls_wR_factor_ref         0.1354
_reflns_number_gt                5447
_reflns_number_total             7064
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic2008182_si_002_2.cif
_cod_data_source_block           HPDQ-Cd
_cod_original_cell_volume        6160(2)
_cod_database_code               4326457