Unexpected room-temperature phosphorescence from a non-aromatic, low molecular weight, pure organic molecule through the intermolecular hydrogen bond
Fang, Manman; Yang, Jie; Xiang, Xueqin; Xie, Yujun; Dong, Yongqiang; Peng, Qian; Li, Qianqian; Li, Zhen; Materials Chemistry Frontiers 2 (2018) 2124–; doi:10.1039/C8QM00396C

data_1554235
_publ_section_title
;
 Unexpected room-temperature phosphorescence from a non-aromatic, low
 molecular weight, pure organic molecule through the intermolecular
 hydrogen bond
;
_journal_issue                   11
_journal_name_full               'Materials Chemistry Frontiers'
_journal_page_first              2124
_journal_paper_doi               10.1039/C8QM00396C
_journal_volume                  2
_journal_year                    2018
_chemical_formula_moiety         'C2.98 H4 O4'
_chemical_formula_sum            'C3 H4 O4'
_chemical_formula_weight         104.06
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_date             2018-03-24
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2018-03-26 deposited with the CCDC.
2018-09-18 downloaded from the CCDC.
;
_cell_angle_alpha                108.358(10)
_cell_angle_beta                 100.693(13)
_cell_angle_gamma                95.006(10)
_cell_formula_units_Z            2
_cell_length_a                   5.146(3)
_cell_length_b                   5.331(3)
_cell_length_c                   8.386(6)
_cell_measurement_reflns_used    52
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20
_cell_measurement_theta_min      7.5
_cell_volume                     211.9(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SMART'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  bruker
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0119
_diffrn_reflns_av_unetI/netI     0.0178
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.987
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            1561
_diffrn_reflns_point_group_measured_fraction_full 0.990
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.319
_diffrn_reflns_theta_min         2.627
_exptl_absorpt_coefficient_mu    0.158
_exptl_absorpt_correction_T_max  0.9587
_exptl_absorpt_correction_T_min  0.9542
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.631
_exptl_crystal_description       block
_exptl_crystal_F_000             108
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.325
_refine_diff_density_min         -0.227
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.096
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     73
_refine_ls_number_reflns         1035
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.131
_refine_ls_R_factor_all          0.0467
_refine_ls_R_factor_gt           0.0433
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0603P)^2^+0.0584P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1131
_refine_ls_wR_factor_ref         0.1166
_reflns_Friedel_coverage         0.000
_reflns_number_gt                918
_reflns_number_total             1035
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8qm00396c3.cif
_cod_data_source_block           MNA
_cod_database_code               1554235
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H,H) groups
2. Restrained distances
 C3-O1
 1.3 with sigma of 0.01
 H2-O2
 0.929 with sigma of 0.01
3.a Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B)
;
_shelx_res_checksum              20561
_shelx_hkl_checksum              97123
_olex2_submission_special_instructions 'No special instructions were received'