Selective off-on fluorescent chemosensor for detection of Fe(3+) ions in aqueous media.
Huang, Liang; Hou, Fengping; Cheng, Ju; Xi, Pinxian; Chen, Fengjuan; Bai, Decheng; Zeng, Zhengzhi; Organic & biomolecular chemistry 10 (2012) 9634–9638; doi:10.1039/c2ob26258d

data_7152660
_publ_section_title
;
 Selective off-on fluorescent chemosensor for detection of Fe(3+) ions in
 aqueous media.
;
_journal_issue                   48
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              9634
_journal_page_last               9638
_journal_paper_doi               10.1039/c2ob26258d
_journal_volume                  10
_journal_year                    2012
_chemical_formula_sum            'C49 H45 N7 O5'
_chemical_formula_weight         811.92
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 94.937(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.198(4)
_cell_length_b                   13.615(3)
_cell_length_c                   17.770(4)
_cell_measurement_reflns_used    5247
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      21.85
_cell_measurement_theta_min      2.25
_cell_volume                     4386.5(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0409
_diffrn_reflns_av_sigmaI/netI    0.0386
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            31444
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.14
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9792
_exptl_absorpt_correction_T_min  0.9745
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.229
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1712
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.460
_refine_diff_density_min         -0.228
_refine_diff_density_rms         0.040
_refine_ls_extinction_coef       0.0018(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.102
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     556
_refine_ls_number_reflns         8124
_refine_ls_number_restraints     18
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.0937
_refine_ls_R_factor_gt           0.0538
_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^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1546
_refine_ls_wR_factor_ref         0.1854
_reflns_number_gt                5102
_reflns_number_total             8124
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ob26258d.txt
_cod_data_source_block           p21c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        4386.4(18)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7152660