Submicromolar fluorescence 'turn-on' detection of fluoride anions using <i>meso</i>-(tetra-aryl) calix[4]pyrrole.
Roy, Anik; Dutta, Ranjan; Halder, Dibakar; Mandal, Koushik; Kundu, Somenath; Hossain, Maidul; Saha, Indrajit; Lee, Chang-Hee; Organic & biomolecular chemistry 23 (2025) 1209–1214; doi:10.1039/d4ob01708k

data_7160298
_publ_section_title
;
 Submicromolar fluorescence 'turn-on' detection of fluoride anions using
 <i>meso</i>-(tetra-aryl) calix[4]pyrrole.
;
_journal_issue                   5
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              1209
_journal_page_last               1214
_journal_paper_doi               10.1039/d4ob01708k
_journal_volume                  23
_journal_year                    2025
_chemical_formula_moiety         'C2 H6 O2, C48 H40 F4 N4'
_chemical_formula_sum            'C50 H46 F4 N4 O2'
_chemical_formula_weight         810.91
_space_group_crystal_system      orthorhombic
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2023-01-20
_audit_creation_method
;
Olex2 1.5
(compiled 2021.12.09 svn.r5202d8cf for OlexSys, GUI svn.r6439)
;
_audit_update_record
;
2024-09-27 deposited with the CCDC.	2024-12-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.116(6)
_cell_length_b                   22.806(9)
_cell_length_c                   11.975(4)
_cell_measurement_reflns_used    9236
_cell_measurement_temperature    273.15
_cell_measurement_theta_max      23.74
_cell_measurement_theta_min      2.17
_cell_volume                     4128(3)
_computing_cell_refinement       'SAINT V8.38A (Bruker, 2018)'
_computing_data_reduction        'SAINT V8.38A (Bruker, 2018)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      273.15
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0802
_diffrn_reflns_av_unetI/netI     0.0442
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            46133
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.347
_diffrn_reflns_theta_min         2.170
_diffrn_source_current           20.0
_diffrn_source_power             1.0
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6759
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1099 before and 0.0663 after correction.
The Ratio of minimum to maximum transmission is 0.9070.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.305
_exptl_crystal_description       block
_exptl_crystal_F_000             1704
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.494
_refine_diff_density_min         -0.498
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     284
_refine_ls_number_reflns         3877
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0810
_refine_ls_R_factor_gt           0.0523
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0532P)^2^+1.8647P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1224
_refine_ls_wR_factor_ref         0.1347
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2677
_reflns_number_total             3877
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4ob01708k2.cif
_cod_data_source_block           2648rkm_0ma_a
_cod_depositor_comments
'Adding full bibliography for 7160298--7160301.cif.'
_cod_database_code               7160298
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.989
_shelx_estimated_absorpt_t_min   0.977
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Others
 Fixed Sof: H25A(0.5) H25B(0.5) H25C(0.5) H26A(0.5) H26B(0.5) H26C(0.5)
3.a Aromatic/amide H refined with riding coordinates:
 N1(H1), N2(H2), N3(H3), C1(H1A), C18(H18), C12(H12), C13(H13), C24(H24),
 C10(H10), C6(H6), C20(H20), C9(H9), C7(H7), C21(H21), C23(H23)
3.b Idealised Me refined as rotating group:
 C4(H4A,H4B,H4C), C16(H16A,H16B,H16C), C25(H25A,H25B,H25C), C26(H26A,H26B,H26C)
;
_shelx_res_checksum              94549
_olex2_submission_special_instructions 'No special instructions were received'