Siloles symmetrically substituted on their 2,5-positions with electron-accepting and donating moieties: facile synthesis, aggregation-enhanced emission, solvatochromism, and device application
Mei, Ju; Wang, Jian; Sun, Jing Zhi; Zhao, Hui; Yuan, Wangzhang; Deng, Chunmei; Chen, Shuming; Sung, Herman H. Y.; Lu, Ping; Qin, Anjun; Kwok, Hoi Sing; Ma, Yuguang; Williams, Ian D.; Tang, Ben Zhong; Chemical Science 3 (2012) 549–; doi:10.1039/c1sc00688f

data_1514949
_publ_section_title
;
 Siloles symmetrically substituted on their 2,5-positions with
 electron-accepting and donating moieties: facile synthesis,
 aggregation-enhanced emission, solvatochromism, and device application
;
_journal_issue                   2
_journal_name_full               'Chemical Science'
_journal_page_first              549
_journal_paper_doi               10.1039/c1sc00688f
_journal_volume                  3
_journal_year                    2012
_chemical_formula_sum            'C32 H26 O2 Si'
_chemical_formula_weight         470.62
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   21.7477(9)
_cell_length_b                   13.4689(6)
_cell_length_c                   35.5044(11)
_cell_measurement_reflns_used    4649
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      71.41
_cell_measurement_theta_min      2.37
_cell_volume                     10399.9(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.983
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0610
_diffrn_reflns_av_sigmaI/netI    0.1004
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            28501
_diffrn_reflns_theta_full        66.50
_diffrn_reflns_theta_max         67.49
_diffrn_reflns_theta_min         2.49
_exptl_absorpt_coefficient_mu    0.996
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.81
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.202
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       bar
_exptl_crystal_F_000             3968
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.485
_refine_diff_density_min         -0.283
_refine_diff_density_rms         0.040
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     635
_refine_ls_number_reflns         9219
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0958
_refine_ls_R_factor_gt           0.0456
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
; calc
[0.00000+1.00000exp(2.00(sin\q/\l)^2^)]/
[\s^2^(Fo^2^)+0.0000+0.0000*P+(0.0170P)^2^+0.0000sin\q/\l]
where P = 0.33333Fo^2^ + 0.66667Fc^2^
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0770
_refine_ls_wR_factor_ref         0.0847
_reflns_number_gt                4805
_reflns_number_total             9219
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1sc00688f.txt
_cod_data_source_block           DMTPS-ALD
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               1514949