Molecular rotational conformation controls the rate of singlet fission and triplet decay in pentacene dimers
Ringström, Rasmus; Edhborg, Fredrik; Schroeder, Zachary W.; Chen, Lan; Ferguson, Michael J.; Tykwinski, Rik R.; Albinsson, Bo; Chemical Science  (2022) –; doi:10.1039/D1SC06285A

data_1566789
_publ_section_title
;
 Molecular rotational conformation controls the rate of singlet fission
 and triplet decay in pentacene dimers
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D1SC06285A
_journal_year                    2022
_chemical_formula_moiety         'C106 H134 Si4, 0.65(C H2 Cl2)'
_chemical_formula_sum            'C106.65 H135.3 Cl1.3 Si4'
_chemical_formula_weight         1575.69
_chemical_name_common            PD3
_chemical_name_systematic
'[{2,5-bis[tris(2-methylpropyl)silyl]benzene-1,4-diyl}bis(ethyne-2,1-diylpentacene-13,6-diylethyne-2,1-diyl)]bis[tris(2-methylpropyl)silane]?0.65CH2Cl2 solvate'
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2021-07-27 deposited with the CCDC.	2022-04-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.616(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.0655(3)
_cell_length_b                   14.6582(5)
_cell_length_c                   41.1040(12)
_cell_measurement_reflns_used    6037
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      69.54
_cell_measurement_theta_min      3.20
_cell_volume                     4857.6(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT-2014/5 (Sheldrick, 2015)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0872
_diffrn_reflns_av_unetI/netI     0.0485
_diffrn_reflns_Laue_measured_fraction_full 0.991
_diffrn_reflns_Laue_measured_fraction_max 0.986
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       50
_diffrn_reflns_limit_l_min       -50
_diffrn_reflns_number            70805
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.986
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         70.321
_diffrn_reflns_theta_min         2.150
_exptl_absorpt_coefficient_mu    1.222
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6947
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
; 
 SADABS 2016/2: Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D., 
 J. Appl. Cryst. 48 (2015) 3-10 
;
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.077
_exptl_crystal_description       rod
_exptl_crystal_F_000             1707
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: CH2Cl2 layer with MeOH'
_exptl_crystal_size_max          0.301
_exptl_crystal_size_mid          0.043
_exptl_crystal_size_min          0.021
_refine_diff_density_max         0.352
_refine_diff_density_min         -0.354
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0.00049(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     527
_refine_ls_number_reflns         9154
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0703
_refine_ls_R_factor_gt           0.0520
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0639P)^2^+1.8403P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1300
_refine_ls_wR_factor_ref         0.1413
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7006
_reflns_number_total             9154
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1sc06285a2.cif
_cod_data_source_block           rrt2053
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_original_formula_sum        'C106.65 H135.30 Cl1.30 Si4'
_cod_database_code               1566789
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.710
_shelx_estimated_absorpt_t_max   0.975
_shelx_res_checksum              82891
_shelx_fab_checksum              792