Acenaphtho[1,2-b]quinoxaline based low band gap copolymers for organic thin film transistor applications
Kanth Siram, Raja Bhaskar; Smith, Jeremy; Anthopoulos, Thomas D.; Patil, Satish; Journal of Materials Chemistry 22 (2012) 4450–; doi:10.1039/c1jm13540f

data_7207371
_publ_section_title
;
 Acenaphtho[1,2-b]quinoxaline based low band gap copolymers for organic
 thin film transistor applications
;
_journal_issue                   10
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              4450
_journal_paper_doi               10.1039/c1jm13540f
_journal_volume                  22
_journal_year                    2012
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C30 H34 N2 O2'
_chemical_formula_sum            'C30 H34 N2 O2'
_chemical_formula_weight         454.59
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 93.194(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.8066(7)
_cell_length_b                   8.6123(4)
_cell_length_c                   16.7680(7)
_cell_measurement_reflns_used    26849
_cell_measurement_temperature    295(1)
_cell_measurement_theta_max      25.99
_cell_measurement_theta_min      2.43
_cell_volume                     2567.48(19)
_computing_cell_refinement       'CrysAlisPro CCD (Oxford Diffraction, 2009)'
_computing_data_collection       'CrysAlisPro CCD (Oxford Diffraction, 2009)'
_computing_data_reduction        'CrysAlisPro RED (Oxford Diffraction, 2009)'
_computing_molecular_graphics
'Ortep-3 (Farrugia, 1997) and CAMERON (Watkin et al., 1993)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      295(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Oxford Xcalibur,Eos(Nova) CCD detector'
_diffrn_measurement_method       'f\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0437
_diffrn_reflns_av_sigmaI/netI    0.0439
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            26849
_diffrn_reflns_reduction_process
;

;
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.43
_exptl_absorpt_coefficient_mu    0.073
_exptl_absorpt_correction_T_max  0.9855
_exptl_absorpt_correction_T_min  0.9783
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlis RED (Oxford Diffraction,2009)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.176
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             976
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.131
_refine_diff_density_min         -0.164
_refine_diff_density_rms         0.033
_refine_ls_extinction_coef       0.0045(10)
_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   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         5054
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.1026
_refine_ls_R_factor_gt           0.0546
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0641P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1356
_refine_ls_wR_factor_ref         0.1551
_reflns_number_gt                2885
_reflns_number_total             5054
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1jm13540f.txt
_cod_data_source_block           rj1_n
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7207371