Photoresponsive SAMs on gold fabricated from azobenzene-functionalised asparagusic acid derivatives
Siemeling, Ulrich; Bruhn, Clemens; Bretthauer, Frauke; Borg, Marta; Träger, Frank; Vogel, Florian; Azzam, Waleed; Badin, Mihaela; Strunskus, Thomas; Wöll, Christof; Dalton Transactions  (2009) 8593–8604; doi:10.1039/b905025f

data_7002499
_publ_section_title
;
 Photoresponsive SAMs on gold fabricated from azobenzene-functionalised
 asparagusic acid derivatives
;
_journal_issue                   40
_journal_name_full               'Dalton Transactions'
_journal_page_first              8593
_journal_page_last               8604
_journal_paper_doi               10.1039/b905025f
_journal_year                    2009
_chemical_formula_moiety         'C23 H17 N3 O2 S2'
_chemical_formula_sum            'C23 H17 N3 O2 S2'
_chemical_formula_weight         431.52
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      4
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 107.080(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.1130(4)
_cell_length_b                   36.802(3)
_cell_length_c                   9.3982(7)
_cell_measurement_reflns_used    12374
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      26.02
_cell_measurement_theta_min      2.27
_cell_volume                     2021.1(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.969
_diffrn_measured_fraction_theta_max 0.969
_diffrn_measurement_details      ' 180 frames, detector distance = 130 mm'
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '0.5 mm diameter, multiple pinhole'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0626
_diffrn_reflns_av_sigmaI/netI    0.0619
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       43
_diffrn_reflns_limit_k_min       -43
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            10340
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.27
_diffrn_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_diffrn_source_current           30
_diffrn_source_power             1.50
_diffrn_source_voltage           50
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.290
_exptl_absorpt_correction_T_max  0.9470
_exptl_absorpt_correction_T_min  0.8454
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'X-red ver. 1.31 (Stoe & Cie. 2004)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.418
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             896
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.51
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.293
_refine_diff_density_min         -0.229
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.30(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.942
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     541
_refine_ls_number_reflns         6507
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.942
_refine_ls_R_factor_all          0.0460
_refine_ls_R_factor_gt           0.0398
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0580P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0918
_refine_ls_wR_factor_ref         0.0933
_reflns_number_gt                5565
_reflns_number_total             6507
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b905025f.txt
_cod_data_source_block           i0251
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7002499