Synthesis and Properties of Fluorescence Dyes: Tetracyclic Pyrazolo[3,4-b]Pyridine-Based Coumarin Chromophores with Intramolecular Charge Transfer Character
Jianhong Chen; Weimin Liu; Jingjin Ma; Haitao Xu; Jiasheng Wu; Xianglin Tang; Zhiyuan Fan; Pengfei Wang; Journal of Organic Chemistry 77 (2012) 3475–3482; doi:10.1021/jo3002722

data_4027132
_publ_section_title
;
 Synthesis and Properties of Fluorescence Dyes: Tetracyclic
 Pyrazolo[3,4-b]Pyridine-Based Coumarin Chromophores with Intramolecular
 Charge Transfer Character
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              3475
_journal_page_last               3482
_journal_paper_doi               10.1021/jo3002722
_journal_volume                  77
_journal_year                    2012
_chemical_formula_moiety         'C30 H26 N4 O2'
_chemical_formula_sum            'C30 H26 N4 O2'
_chemical_formula_weight         474.55
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                103.417(8)
_cell_angle_beta                 93.162(6)
_cell_angle_gamma                90.024(5)
_cell_formula_units_Z            2
_cell_length_a                   10.157(3)
_cell_length_b                   10.670(3)
_cell_length_c                   11.257(3)
_cell_measurement_reflns_used    429
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.17
_cell_volume                     1184.8(6)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0552
_diffrn_reflns_av_sigmaI/netI    0.0544
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            13324
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.37
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9958
_exptl_absorpt_correction_T_min  0.9832
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.330
_exptl_crystal_description       needle
_exptl_crystal_F_000             500
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.188
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.211
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         4166
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.211
_refine_ls_R_factor_all          0.0947
_refine_ls_R_factor_gt           0.0756
_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^)+(0.0373P)^2^+0.7448P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1392
_refine_ls_wR_factor_ref         0.1475
_reflns_number_gt                3469
_reflns_number_total             4166
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo3002722_si_008.cif
_cod_data_source_block           sa850
_cod_database_code               4027132