From benzyl to fluorenyl: enhancing photostability and modulating optoelectronic properties of <i>para</i>-azaquinodimethanes.
Zwaihed, Walaa; Maurel, François; Allain, Magali; Pauli, Guido F.; Cabanetos, Clément; Kobeissi, Marwan; Schmaltz, Bruno; Chemical communications (Cambridge, England) 62 (2026) 3347–3351; doi:10.1039/d5cc06382e

data_7135476
_publ_section_title
;
 From benzyl to fluorenyl: enhancing photostability and modulating
 optoelectronic properties of <i>para</i>-azaquinodimethanes.
;
_journal_issue                   10
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              3347
_journal_page_last               3351
_journal_paper_doi               10.1039/d5cc06382e
_journal_volume                  62
_journal_year                    2026
_chemical_formula_moiety         'C42 H42 N2 O2'
_chemical_formula_sum            'C42 H42 N2 O2'
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_symmetry_space_group_name_Hall  '-P 1'
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;
2025-06-12 deposited with the CCDC.	2026-01-08 downloaded from the CCDC.
;
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_computing_molecular_graphics    'DIAMOND 3.2k (Crystal Impact GbR, 2014)'
_computing_publication_material  'WinGX publication routines (Farrugia, V2018)'
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_diffrn_reflns_point_group_measured_fraction_full 0.981
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_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.68406
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
        CrysAlisPro 1.171.41.118a (Rigaku Oxford Diffraction, 2021)
        Empirical absorption correction using spherical harmonics,
        implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red
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_exptl_crystal_description       prism
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_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.095
_refine_diff_density_max         0.216
_refine_diff_density_min         -0.161
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
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_refine_ls_number_reflns         6668
_refine_ls_number_restraints     0
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_refine_ls_R_factor_all          0.0467
_refine_ls_R_factor_gt           0.0418
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0659P)^2^+0.1501P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1125
_refine_ls_wR_factor_ref         0.118
_reflns_Friedel_coverage         0
_reflns_number_gt                5865
_reflns_number_total             6668
_reflns_threshold_expression     'I > 2\s(I)'
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_cod_database_code               7135476
_shelx_shelxl_version_number     2018/3
_shelx_res_checksum              98742
_shelx_hkl_checksum              36502