New type of dual solid-state thermochromism: modulation of intramolecular charge transfer by intermolecular pi-pi interactions, kinetic trapping of the aci-nitro group, and reversible molecular locking.
Naumov, Pance; Lee, Sang Cheol; Ishizawa, Nobuo; Jeong, Young Gyu; Chung, Ihn Hee; Fukuzumi, Shunichi; The journal of physical chemistry. A 113 (2009) 11354–11366; doi:10.1021/jp902517x

data_1516373
_publ_section_title
;
 New type of dual solid-state thermochromism: modulation of intramolecular
 charge transfer by intermolecular pi-pi interactions, kinetic trapping of
 the aci-nitro group, and reversible molecular locking.
;
_journal_issue                   42
_journal_name_full               'The journal of physical chemistry. A'
_journal_page_first              11354
_journal_page_last               11366
_journal_paper_doi               10.1021/jp902517x
_journal_volume                  113
_journal_year                    2009
_chemical_formula_sum            'C14 H22 N4 O6'
_chemical_formula_weight         342.36
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 91.427(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   8.3906(19)
_cell_length_b                   14.517(3)
_cell_length_c                   26.835(6)
_cell_measurement_temperature    293(2)
_cell_volume                     3267.7(12)
_computing_cell_refinement       'APEX2 software (Bruker, 2007)'
_computing_data_collection       'APEX2 software (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2005)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART APEX2 diffractometer'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'multilayer confocal TXS mirror'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0944
_diffrn_reflns_av_sigmaI/netI    0.0760
_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       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            30523
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.52
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_type   sphere
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.392
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1456
_exptl_crystal_size_max          0.135
_exptl_crystal_size_mid          0.055
_exptl_crystal_size_min          0.015
_refine_diff_density_max         0.296
_refine_diff_density_min         -0.239
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.903
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     457
_refine_ls_number_reflns         5730
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.903
_refine_ls_R_factor_all          0.1683
_refine_ls_R_factor_gt           0.0547
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0725P)^2^+1.7745P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1320
_refine_ls_wR_factor_ref         0.1751
_reflns_number_gt                2303
_reflns_number_total             5730
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp902517x_si_009.cif
_cod_data_source_block           bdb4_2_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        3267.7(13)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               1516373