Table 1.

Spectral properties of the dyes and their conjugates with glucose (dye‐G) in aqueous solutions (pH 7.3).

Dye	Absorption λ max, nm (ϵ)[a]	Emission λ max, nm (Φ fl)[b]	Fluorescence lifetime τ, ns
APTS [c]	424 (20 600)	500 (0.95)	–
APTS‐G6 [d]	455 (17 160)	511 (0.92)	5.1
PCN	454 (23 900)	531 (0.93)	5.6
PCN‐G	484 (29 000)	544 (0.92)	5.5
PSN	471 (18 000)	544 (0.91)	5.6
PSN‐G	496 (30 000)	558 (0.91)	5.7
PAZ	476 (19 000)	543 (0.92)	5.9
PAZ‐G	505	564 (0.90)	5.8
PSU	477 (19 600)	542 (0.92)	5.8
PSU‐G	506	558 (0.95)	5.8

[a] Molar extinction coefficient, M⁻¹ cm⁻¹. [b] Absolute value of the fluorescence quantum yield. [c] Data from Ref. [20]. [d] Data from Ref. [10a].