A highly selective ratiometric detection of F- based on excited-state intramolecular proton-transfer (imidazole) materials
Kunchala Dhanunjayarao; Vanga Mukundam; Krishnan Venkatasubbaiah; Journal of Materials Chemistry C 2 (2014) 8599–8606; doi:10.1039/C4TC01711K

data_7233885
_publ_section_title
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 A highly selective ratiometric detection of F- based on excited-state
 intramolecular proton-transfer (imidazole) materials
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              8599
_journal_page_last               8606
_journal_paper_doi               10.1039/C4TC01711K
_journal_volume                  2
_journal_year                    2014
_chemical_formula_moiety         'C44 H40 N2 O Si'
_chemical_formula_sum            'C44 H40 N2 O Si'
_chemical_formula_weight         640.87
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 91.515(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.8683(6)
_cell_length_b                   10.4772(4)
_cell_length_c                   23.5294(10)
_cell_measurement_reflns_used    4678
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      21.26
_cell_measurement_theta_min      2.54
_cell_volume                     3664.1(3)
_computing_cell_refinement       'SAINT (Bruker, 2007)'
_computing_data_collection       'SMART (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0814
_diffrn_reflns_av_sigmaI/netI    0.0535
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            55590
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         2.13
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.100
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.7055
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Blessing, 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.162
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.189
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.036
_refine_ls_extinction_coef       0.0013(4)
_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   0.995
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     438
_refine_ls_number_reflns         9104
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.995
_refine_ls_R_factor_all          0.1277
_refine_ls_R_factor_gt           0.0525
_refine_ls_shift/su_max          0.061
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0655P)^2^+0.3278P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1243
_refine_ls_wR_factor_ref         0.1545
_reflns_number_gt                4357
_reflns_number_total             9104
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1000001.cif
_cod_data_source_block           PCOD1000001
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the built-in table derived from the
CIF Core dictionary named 'cif_core.dic' version 2.4.5 last updated
on 2014-11-21.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7233885