Off-on-off fluorescent chemosensor for pH measurement with a terbium(iii) complex based on a tripodal salicylic-acid derivative.
Yang, Yan-Ling; Wang, Ya-Wen; Duan, Dong-Zhu; Zhang, Ai-Jiang; Fang, Jian-Guo; Peng, Yu; Organic & biomolecular chemistry 11 (2013) 6960–6966; doi:10.1039/c3ob41319e

data_7153104
_publ_section_title
;
 Off-on-off fluorescent chemosensor for pH measurement with a terbium(iii)
 complex based on a tripodal salicylic-acid derivative.
;
_journal_issue                   40
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              6960
_journal_page_last               6966
_journal_paper_doi               10.1039/c3ob41319e
_journal_volume                  11
_journal_year                    2013
_chemical_formula_sum            'C76 H74 Br6 N6 O26 S2 Tb2'
_chemical_formula_weight         2348.82
_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
_cell_angle_alpha                76.169(2)
_cell_angle_beta                 87.766(2)
_cell_angle_gamma                88.385(2)
_cell_formula_units_Z            1
_cell_length_a                   12.818(2)
_cell_length_b                   12.868(2)
_cell_length_c                   16.038(3)
_cell_measurement_reflns_used    3972
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      22.66
_cell_measurement_theta_min      2.26
_cell_volume                     2566.2(7)
_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      296(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0428
_diffrn_reflns_av_sigmaI/netI    0.0751
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            18184
_diffrn_reflns_theta_full        25.10
_diffrn_reflns_theta_max         25.10
_diffrn_reflns_theta_min         2.26
_exptl_absorpt_coefficient_mu    3.809
_exptl_absorpt_correction_T_max  0.433
_exptl_absorpt_correction_T_min  0.332
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.520
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1152
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.22
_platon_squeeze_details
;
;
_refine_diff_density_max         1.746
_refine_diff_density_min         -0.829
_refine_diff_density_rms         0.129
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.858
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     537
_refine_ls_number_reflns         9034
_refine_ls_number_restraints     276
_refine_ls_restrained_S_all      0.863
_refine_ls_R_factor_all          0.0674
_refine_ls_R_factor_gt           0.0468
_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^)+(0.1000P)^2^+0.8067P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1280
_refine_ls_wR_factor_ref         0.1380
_reflns_number_gt                6781
_reflns_number_total             9034
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3ob41319e.txt
_cod_data_source_block           3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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        2566.1(7)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7153104