Table 3.

Relevant (VT) ¹H NMR, temperature gradients and 2D-¹H-DOSY NMR data (500 MHz, DMSO-d₆) of G-0 dendrons 2a, 3, G-1 dendrons D-Cl, D-N<P>NH and G-2 dendrimers 4–6, 7a, 7b, 8, 9.

No.	δH (ppm) values of indicative NH protons (see Figure 2)				temperature gradients (TGs) as (ΔδH/ΔΤ) × 103 (ppb K−1)a		Db (µm2 s−1)	dHb (nm)
	NH adjacent to s-triazine T-0		NH adjacent s-triazine T-2		NH adjacent to s-triazine T-0	NH adjacent s-triazine T-2
	298 K	363 K	298 K	363 K
2ac	10.03 9.96 9.85	9.63	–	–	−6.15 −5.08 −3.38		198	1.10
3	8.87	8.50	–	–	−5.69		191	1.14
D-Cl	9.08	8.70	–	–	−5.85		129	1.69
D-N<P>NH	8.93	8.57	–	–	−5.54		110	1.98
4	9.71	8.93	–	–	−12.00		89	2.45
5	8.92	8.51 8.53 8.55 8.60	–	–	−6.31 −6.00 −5.69 −4.92		88	2.48
6d	–	8.55	–	9.02	–		–	–
7a	8.94	8.55	–	–	−6.00		107	2.04
7b	8.93	8.53	–	–	−6.15		105 225	2.08 0.97
8	8.93	8.54	8.93	8.60	−6.00	−5.08e	113	1.93
9	8.94	8.54	8.70	8.57	−6.15	−2.00f	115	1.90

^aTGs calculated as [(δ_H^{298 K} − δ_H^{T K})/(298 K – T K)] × 10³ < 0 (where T = 363 K). ^bd_H (hydrodynamic diameter) issued from D [diffusion coefficient observed in 2D-¹H-DOSY NMR charts as 5.0 mM (2a, 3, D-Cl, D-N<P>NH, 5, 8 and 9) or 2.5 mM (4, 7a and 7b) in DMSO-d₆ (η, dynamic viscosity 2.00 × 10⁻³ kg m⁻¹ s⁻¹) at 298 K] by applying the Stokes–Einstein equation. ^cMultiple δ_H and TG values due to more than one (anti–anti major 64% vs anti–syn minor 36%) species found in a frozen rotational equilibrium in agreement with the highest π-deficiency of the s-triazine ring in the analysed series (Figure 2; Supporting Information File 1, p. S12, Figure S1). ^dDue to the low solubility of compound 6 in DMSO-d₆, its convincing NMR spectra could be obtained at 363 K only. ^eTG as −6.92 ppb K⁻¹ in the starting material C1. ^fTG as −6.07 ppb K⁻¹ in the starting material C3.