Adjustment of the solid fluorescence of a chalcone derivative through controlling steric hindrance
Zhang, Liang; Liu, Jie; Gao, Junkuo; Lu, Rong; Liu, Fang; RSC Adv. 7 (2017) 46354–; doi:10.1039/C7RA09122B

data_7229264
_publ_section_title
;
 Adjustment of the solid fluorescence of a chalcone derivative through
 controlling steric hindrance
;
_journal_issue                   73
_journal_name_full               'RSC Adv.'
_journal_page_first              46354
_journal_paper_doi               10.1039/C7RA09122B
_journal_volume                  7
_journal_year                    2017
_chemical_formula_sum            'C28 H22 O2'
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_space_group_crystal_system      orthorhombic
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_space_group_name_Hall           'P 2c -2ac'
_space_group_name_H-M_alt        'P c a 21'
_symmetry_space_group_name_Hall  'P 2c -2ac'
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_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-07-26 deposited with the CCDC.
2017-09-26 downloaded from the CCDC.
;
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_computing_cell_refinement       'Bruker SAINT'
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_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
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_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
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_diffrn_reflns_av_unetI/netI     0.0905
_diffrn_reflns_Laue_measured_fraction_full 0.997
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_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            36433
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        21.034
_diffrn_reflns_theta_max         21.034
_diffrn_reflns_theta_min         2.309
_exptl_absorpt_coefficient_mu    0.079
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_exptl_absorpt_correction_T_min  0.6015
_exptl_absorpt_process_details   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.286
_exptl_crystal_description       prism
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_refine_diff_density_max         0.636
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_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   -3(5)
_refine_ls_extinction_method     none
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_refine_ls_R_factor_all          0.1442
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_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1734P)^2^+5.8953P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_refine_ls_wR_factor_ref         0.2691
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_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                5368
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_cod_data_source_file            c7ra09122b2.cif
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_exptl_absorpt_special_details   'Bruker SADABS'
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