Mechanism and Kinetics of Fluorescence Quenching of Fluorene-Endcapped Butatriene: A Microspectroscopic Study of the Discrete State Constructed in Microcrystals
Hirao, Yasukazu; Ihara, Keiji; Ishibashi, Yukihide; Tiu, Elisha Gabrielle; Asahi, Tsuyoshi; Kubo, Takashi; The Journal of Physical Chemistry C 126 (2022) 1196–1203; doi:10.1021/acs.jpcc.1c09163

data_1566303
_publ_section_title
;
 Mechanism and Kinetics of Fluorescence Quenching of Fluorene-Endcapped
 Butatriene: A Microspectroscopic Study of the Discrete State Constructed
 in Microcrystals
;
_journal_issue                   2
_journal_name_full               'The Journal of Physical Chemistry C'
_journal_page_first              1196
_journal_page_last               1203
_journal_paper_doi               10.1021/acs.jpcc.1c09163
_journal_volume                  126
_journal_year                    2022
_chemical_formula_sum            'C28 H16'
_chemical_formula_weight         352.41
_chemical_name_systematic
;
1,2-di(9H-fluoren-9-ylidene)ethene
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/1
_cell_angle_alpha                90
_cell_angle_beta                 100.125(7)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.6580(9)
_cell_length_b                   5.9900(5)
_cell_length_c                   13.4368(12)
_cell_measurement_reflns_used    5377
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      3.55
_cell_volume                     923.70(14)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO (Rigaku, ????)'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics
;
Yadokari-XG 2009 (K. Wakita, T. Nemoto, et al., 2009)
;
_computing_publication_material
;
Yadokari-XG 2009 (K. Wakita, T. Nemoto, et al., 2009)
;
_computing_structure_refinement  'SHELXL-2018/1 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT-2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
;
Rigaku MicroMax-007HF,VariMax-Mo and RAPID II
;
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0437
_diffrn_reflns_av_unetI/netI     0.0371
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            8471
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.467
_diffrn_reflns_theta_min         3.080
_diffrn_source                   'micro-focus rotating anode'
_exptl_absorpt_coefficient_mu    0.072
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7786
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Empirical Absorption Correction   March 2001 T. Higashi
    Rigaku Corporation, Tokyo, Japan
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             368
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.115
_refine_diff_density_min         -0.143
_refine_diff_density_rms         0.029
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         2110
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0920
_refine_ls_R_factor_gt           0.0462
_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^)+(0.0427P)^2^+0.1364P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0953
_refine_ls_wR_factor_ref         0.1095
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1312
_reflns_number_total             2110
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jp1c09163_si_002.cif
_cod_data_source_block           3a
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               1566303
_shelx_shelxl_version_number     2018/1
_shelx_estimated_absorpt_t_min   0.972
_shelx_estimated_absorpt_t_max   0.999
_shelx_res_checksum              70488
_shelx_hkl_checksum              80667