Synthesis of tunable, red fluorescent aggregation-enhanced emissive organic fluorophores: stimuli-responsive high contrast off–on fluorescence switching
Hariharan, Palamarneri Sivaraman; Gayathri, Parthasarathy; Kundu, Anu; Karthikeyan, Subramanian; Moon, Dohyun; Anthony, Savarimuthu Philip; CrystEngComm 20 (2018) 643–; doi:10.1039/C7CE01867C

data_7229783
_publ_section_title
;
 Synthesis of tunable, red fluorescent aggregation-enhanced emissive
 organic fluorophores: stimuli-responsive high contrast off--on
 fluorescence switching
;
_journal_issue                   5
_journal_name_full               CrystEngComm
_journal_page_first              643
_journal_paper_doi               10.1039/C7CE01867C
_journal_volume                  20
_journal_year                    2018
_chemical_formula_moiety         'C25 H21 N3 O3'
_chemical_formula_sum            'C25 H21 N3 O3'
_chemical_formula_weight         411.45
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2017-10-12 deposited with the CCDC.
2017-12-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 94.73(3)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   34.885(7)
_cell_length_b                   6.4970(13)
_cell_length_c                   18.207(4)
_cell_measurement_reflns_used    46460
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      33.749
_cell_measurement_theta_min      0.401
_cell_volume                     4112.5(15)
_computing_cell_refinement       '<i>HKL3000sm</i>(Otwinowski & Minor, 1997)'
_computing_data_collection
'<i>PAL BL2D-SMDC Program</i>(Shin et. al, 2016)'
_computing_data_reduction        '<i>HKL3000sm</i>(Otwinowski & Minor, 1997)'
_computing_molecular_graphics    '<i>DIAMOND 4</i>(Putz & Brandenburg, 2014)'
_computing_publication_material  '<i>enCifer 1.5.1</i>'
_computing_structure_refinement  '<i>SHELXL-2014</i> (Sheldrick, 2015)'
_computing_structure_solution    '<i>SHELXT-2014</i> (Sheldrick, 2015)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'ADSC Q210 CCD area detector'
_diffrn_measurement_method       'omega scan'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.700
_diffrn_reflns_av_R_equivalents  0.0448
_diffrn_reflns_av_unetI/netI     0.0433
_diffrn_reflns_Laue_measured_fraction_full 0.989
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       43
_diffrn_reflns_limit_h_min       -43
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            14671
_diffrn_reflns_point_group_measured_fraction_full 0.989
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        24.835
_diffrn_reflns_theta_max         25.999
_diffrn_reflns_theta_min         2.211
_diffrn_source                   'PLSII 2D bending magnet'
_exptl_absorpt_coefficient_mu    0.086
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.910
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
'<i>HKL3000sm Scalepack(Otwinowski & Minor, 1997)</i>'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.329
_exptl_crystal_description       needle
_exptl_crystal_F_000             1728
_exptl_crystal_preparation       Luminescent
_exptl_crystal_size_max          0.195
_exptl_crystal_size_mid          0.087
_exptl_crystal_size_min          0.085
_refine_diff_density_max         0.331
_refine_diff_density_min         -0.267
_refine_diff_density_rms         0.065
_refine_ls_extinction_coef       0.0091(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.001
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     283
_refine_ls_number_reflns         4167
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.001
_refine_ls_R_factor_all          0.0690
_refine_ls_R_factor_gt           0.0467
_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^)+(0.0812P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1189
_refine_ls_wR_factor_ref         0.1285
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2933
_reflns_number_total             4167
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7ce01867c2.cif
_cod_data_source_block           SPA143
_cod_depositor_comments
'Adding full bibliography for 7229783--7229787.cif.'
_cod_original_cell_volume        4112.5(14)
_cod_database_code               7229783
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.983
_shelx_estimated_absorpt_t_max   0.993
_shelx_res_checksum              23178