Carbon dots with high fluorescence quantum yield: the fluorescence originates from organic fluorophores.
Shi, Lei; Yang, Jian Hai; Zeng, Hai Bo; Chen, Yong Mei; Yang, Sheng Chun; Wu, Chao; Zeng, Hao; Yoshihito, Osada; Zhang, Qiqing; Nanoscale 8 (2016) 14374–14378; doi:10.1039/c6nr00451b

data_1543627
_publ_section_title
;
 Carbon dots with high fluorescence quantum yield: the fluorescence
 originates from organic fluorophores.
;
_journal_issue                   30
_journal_name_full               Nanoscale
_journal_page_first              14374
_journal_page_last               14378
_journal_paper_doi               10.1039/c6nr00451b
_journal_volume                  8
_journal_year                    2016
_chemical_formula_sum            'C9 H7 N O5 S'
_chemical_formula_weight         241.22
_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            8
_cell_length_a                   11.021(5)
_cell_length_b                   9.374(4)
_cell_length_c                   18.596(8)
_cell_measurement_temperature    296(2)
_cell_volume                     1921.2(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0158
_diffrn_reflns_av_sigmaI/netI    0.0118
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            8427
_diffrn_reflns_theta_full        24.89
_diffrn_reflns_theta_max         24.89
_diffrn_reflns_theta_min         2.19
_exptl_absorpt_coefficient_mu    0.342
_exptl_absorpt_correction_T_max  0.515
_exptl_absorpt_correction_T_min  0.300
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.668
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             992
_refine_diff_density_max         0.214
_refine_diff_density_min         -0.270
_refine_diff_density_rms         0.046
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     147
_refine_ls_number_reflns         1639
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0309
_refine_ls_R_factor_gt           0.0285
_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^)+(0.0357P)^2^+1.1193P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0728
_refine_ls_wR_factor_ref         0.0748
_reflns_number_gt                1527
_reflns_number_total             1639
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6nr00451b2.cif
_cod_data_source_block           1
_cod_depositor_comments
'Adding full bibliography for 1543626--1543627.cif.'
_cod_original_cell_volume        1921.2(14)
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               1543627