A cryogenic luminescent ratiometric thermometer based on a lanthanide phosphonate dimer
Min Ren; Carlos D. S. Brites; Song-Song Bao; Rute A. S. Ferreira; Li-Min Zheng; Luis D. Carlos; Journal of Materials Chemistry C 3 (2015) 8480–8484; doi:10.1039/C5TC01468A

data_7234402
_publ_section_title
;
 A cryogenic luminescent ratiometric thermometer based on a lanthanide
 phosphonate dimer
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              8480
_journal_page_last               8484
_journal_paper_doi               10.1039/C5TC01468A
_journal_volume                  3
_journal_year                    2015
_chemical_formula_moiety         'C18 H48 Eu2 N8 O26 P6, 8(H2 O)'
_chemical_formula_sum            'C18 H64 Eu2 N8 O34 P6'
_chemical_formula_weight         1426.51
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_cell_angle_alpha                90
_cell_angle_beta                 108.570(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   10.8792(11)
_cell_length_b                   13.1682(11)
_cell_length_c                   17.0596(18)
_cell_measurement_reflns_used    2190
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.92
_cell_measurement_theta_min      3.08
_cell_volume                     2316.7(4)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SAINT (Bruker, 2000)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXTL (Bruker, 2000)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 'phi and omega scans'
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  graphite
_diffrn_measurement_method       'CCD area detector'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1026
_diffrn_reflns_av_unetI/netI     0.1041
_diffrn_reflns_Laue_measured_fraction_full 0.991
_diffrn_reflns_Laue_measured_fraction_max 0.989
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13358
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.500
_diffrn_reflns_theta_min         3.077
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    3.002
_exptl_absorpt_correction_T_max  0.714
_exptl_absorpt_correction_T_min  0.704
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS(Bruker, 2000)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.045
_exptl_crystal_description       sheet-like
_exptl_crystal_F_000             1432
_exptl_crystal_preparation       Luminescent
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.765
_refine_diff_density_min         -1.177
_refine_diff_density_rms         0.188
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.961
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         4268
_refine_ls_number_restraints     60
_refine_ls_restrained_S_all      0.962
_refine_ls_R_factor_all          0.0874
_refine_ls_R_factor_gt           0.0437
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0108P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0552
_refine_ls_wR_factor_ref         0.0609
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                2923
_reflns_number_total             4268
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            J-Mater-Chem-C-2015-3-8480.cif
_cod_data_source_block           Eu
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7234402
_shelxl_version_number           2013-4
_shelx_res_checksum              79038
_shelx_hkl_checksum              26151