Bent-to-planar Si-rhodamines: a distinct rehybridization lights up NIR-II fluorescence for tracking nitric oxide in the Alzheimer's disease brain.
Xu, Qingshuang; Zhang, Yutao; Zhu, Mingming; Yan, Chenxu; Mao, Wenle; Zhu, Wei-Hong; Guo, Zhiqian; Chemical science 14 (2023) 4091–4101; doi:10.1039/d3sc00193h

data_1568674
_publ_section_title
;
 Bent-to-planar Si-rhodamines: a distinct rehybridization lights up NIR-II
 fluorescence for tracking nitric oxide in the Alzheimer's disease brain.
;
_journal_issue                   15
_journal_name_full               'Chemical science'
_journal_page_first              4091
_journal_page_last               4101
_journal_paper_doi               10.1039/d3sc00193h
_journal_volume                  14
_journal_year                    2023
_chemical_absolute_configuration ad
_chemical_formula_sum            'C29 H38 N4 Si'
_chemical_formula_weight         470.72
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2013
_audit_update_record
;
2021-11-02 deposited with the CCDC.	2023-03-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.4703(2)
_cell_length_b                   13.2994(3)
_cell_length_c                   24.4250(7)
_cell_measurement_reflns_used    9725
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      54.182
_cell_measurement_theta_min      4.528
_cell_volume                     2751.47(12)
_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-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.996
_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  0.0423
_diffrn_reflns_av_unetI/netI     0.0362
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            24545
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.999
_diffrn_reflns_theta_min         2.545
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6649
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.136
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             1016
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.120
_refine_diff_density_max         0.737
_refine_diff_density_min         -0.326
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details
; 
 Flack x determined using 1897 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons and Flack (2004), Acta Cryst. A60, s61). 
;
_refine_ls_abs_structure_Flack   0.05(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     321
_refine_ls_number_reflns         5417
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0566
_refine_ls_R_factor_gt           0.0476
_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^)+(0.0605P)^2^+0.9256P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1161
_refine_ls_wR_factor_ref         0.1237
_reflns_Friedel_coverage         0.760
_reflns_Friedel_fraction_full    0.998
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                4810
_reflns_number_total             5417
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3sc00193h2.cif
_cod_data_source_block           mo_dd20179_0m
_cod_depositor_comments
'Adding full bibliography for 1568674--1568676.cif.'
_cod_database_code               1568674
_shelx_estimated_absorpt_t_min   0.979
_shelx_estimated_absorpt_t_max   0.987
_shelxl_version_number           2013-4
_shelx_res_checksum              44983